@Misc {renewableenergystatistics,
       author       = "Eurostat",
       title        = "Renewable energy statistics",
       howpublished = "Online accessed 10-march-2017",
       month        = "Juli",
       year         = "2016",
       url          = "http://ec.europa.eu/eurostat/statistics-explained/index.php/File:Electricity_generated_from_renewable_energy_sources,_EU-28,_2004–14_YB16.png",
       note         = "Online accessed 10-march-2017"}
 
@Misc {nspecodeofethicsforengineers,
       author       = "National Society of Professional Engineers",
       title        = "NSPE Code of Ethics for Engineers",
       howpublished = "Online accessed 17-march-2017",
       month        = "Juli",
       year         = "2007",
       url          = "https://www.nspe.org/resources/ethics/code-ethics",
       note         = "Online accessed 17-march-2017"}
 
@Misc {cop21,
       author       = "Connaisance des Energies",
       title        = "COP21",
       howpublished = "Online accessed 17-march-2017",
       month        = "November",
       year         = "2016",
       url          = "http://www.connaissancedesenergies.org/fiche-pedagogique/cop21-conference-sur-le-climat-de-paris",
       note         = "Online accessed 17-march-2017"}       
 
@Misc {statementofethics,
       author       = "American Marketing Association",
       title        = "Statement of ethics",
       howpublished = "Online accessed 22-march-2017",
       url          = "https://archive.ama.org/Archive/AboutAMA/Pages/Statement%20of%20Ethics.aspx",
       note         = "Online accessed 22-march-2017"}
 
@Misc {arduinomicro,
       author       = "Pololu",
       title        = "Arduino Micro",
       howpublished = "Online accessed 25-march-2017",
       url          = "https://a.pololu-files.com/picture/0J4499.1200.jpg?3dd29fa5909cf0ca0bee4cab09178861",
       note         = "Online accessed 25-march-2017"}
 
@Misc {arduinouno,
       author       = "CNBD",
       title        = "Arduino Uno",
       howpublished = "Online accessed 25-march-2017",
       url          = "http://cndb.arduino.org/media/k2/galleries/90/A000066-Arduino-Uno-TH-1front.jpg",
       note         = "Online accessed 25-march-2017"}
 
@Misc {arduinoleonardo,
       author       = "Pololu",
       title        = "Arduino Leonardo",
       howpublished = "Online accessed 25-march-2017",
       url          = "https://a.pololu-files.com/picture/0J3975.1200.jpg?773731625ebad6f459b06cf5cde22f5c",
       note         = "Online accessed 25-march-2017"}
 
@Misc {arduinonano,
       author       = "Hackster",
       title        = "Arduino Nano",
       howpublished = "Online accessed 25-march-2017",
       url          = "https://hackster.imgix.net/uploads/image/file/97103/Ard_Nano.jpg?auto=compress%2Cformat&w=400&h=300&fit=max",
       note         = "Online accessed 25-march-2017"} 
 
@Misc {teensy20,
       author       = "CDN",
       title        = "Teensy 2.0",
       howpublished = "Online accessed 25-march-2017",
       url          = "https://cdn.sparkfun.com//assets/parts/9/5/3/5/12765-02.jpg",
       note         = "Online accessed 25-march-2017"}
 
@Misc {aerogarden,
       author       = "Les Nouveaux Jardins",
       title        = "AeroGarden",
       howpublished = "Online accessed 20-march-2017",
       url          = "http://www.lesnouveauxjardins.com/3064-thickbox_default/aerogarden-un-jardin-dans-la-cuisine.jpg",
       note         = "Online accessed 20-march-2017"}
 
@Misc {pestle,
       author       = "Murphy Marketing",
       title        = "Pestle",
       howpublished = "Online accessed 12-march-2017",
       url          = "http://www.murphymarketing.ie/wp-content/uploads/2015/09/pestle.jpg",
       note         = "Online accessed 12-march-2017"}
 
@Misc {microenvironment,
       author       = "CDN",
       title        = "Micro Environment",
       howpublished = "Online accessed 15-march-2017",
       url          = "https://image.slidesharecdn.com/ch-131231040043-phpapp02/95/chapter2-marketing-environment-6-638.jpg?cb=1388462500",
       note         = "Online accessed 15-march-2017"}
 
@Misc {fruitandvegetablesconsumptionineurope,
       author       = "Eufic",
       title        = "Fruit and Vegetables Consumption in Europe",
       howpublished = "Online accessed 22-march-2017",
       month        = "January",
       year         = "2012",
       url          = "http://www.eufic.org/en/healthy-living/article/fruit-and-vegetable-consumption-in-europe-do-europeans-get-enough",
       note         = "Online accessed 22-march-2017"}
 
@Misc {conductionradiationandconvection,
       author       = "Wikispaces",
       title        = "Conduction, radiation and convection",
       howpublished = "Online accessed 22-march-2017",
       url          = "https://researchthetopic.wikispaces.com/file/view/convection%20thing%20thing%20Aeb.jpg/369589618/315x237/convection%20thing%20thing%20Aeb.jpg",
       note         = "Online accessed 22-march-2017"}
 
@Misc {basil,
       author       = "Gourmet Garden",
       title        = "Basil",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.gourmetgarden.com/sites/gourmetgarden.sites.go1.com.au/files/atp_gen_gourm_0210_189_basil.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {dill,
       author       = "Organic Facts",
       title        = "Dill",
       howpublished = "Online accessed 10-march-2017",
       url          = "https://www.organicfacts.net/wp-content/uploads/2013/07/Dill-1020x765.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {lettuce,
       author       = "Moslim Observer",
       title        = "Lettuce",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://muslimobserver.com/wp-content/uploads/2015/07/photodune-2717005-lettuce-m.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {oregano,
       author       = "Medical News Today",
       title        = "Oregano",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.medicalnewstoday.com/content/images/articles/266/266259/oregano-leaves.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {parsley,
       author       = "Medical News Today",
       title        = "Parsley",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.medicalnewstoday.com/content/images/articles/284/284490/parsley.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {rosemary,
       author       = "Kinder Soaps",
       title        = "Rosemary",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.kindersoaps.com/wp-content/kindersoaps.com/2014/09/rosemary.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {celery,
       author       = "Draxe",
       title        = "Celery",
       howpublished = "Online accessed 10-march-2017",
       url          = "https://draxe.com/wp-content/uploads/2015/04/bigstock-Fresh-green-celery-isolated-on-52080031.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {cucumber,
       author       = "Live Science",
       title        = "Cucumber",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.livescience.com/images/i/000/076/219/original/cucumbers.jpg?interpolation=lanczos-none&downsize=*:1000",
       note         = "Online accessed 10-march-2017"}
 
@Misc {onion,
       author       = "Pet poison help online",
       title        = "Onion",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.petpoisonhelpline.com/wp-content/uploads/2011/10/Onion.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {capsicum,
       author       = "Fir0002",
       title        = "Capsicum",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.flagstaffotos.com.au/legacy",
       note         = "Online accessed 10-march-2017"}
 
@Misc {spinach,
       author       = "Medical News today",
       title        = "Spinach",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://cdn1.medicalnewstoday.com/content/images/articles/270609-spinach.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {thyme,
       author       = "Mercola",
       title        = "Thyme",
       howpublished = "Online accessed 10-march-2017",
       url          = "https://media.mercola.com/assets/images/foodfacts/thyme-fb.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {greenhouseshapes,
       author       = "Globalspec",
       title        = "Greenhouse shapes",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.globalspec.com/ImageRepository/LearnMore/201510/Types%20of%20greenhouse%20structuresf086da34c35343779a26aa9dc9fbf80e.png",
       note         = "Online accessed 10-march-2017"}
 
@Misc {lowtechnologygreenhouse,
       author       = "Agritech",
       title        = "Low Technology Greenhouse",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://agritech.tnau.ac.in/horticulture/horti_Greenhouse%20cultivation_clip_image002.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {mediumtechnologygreenhouse,
       author       = "Horti Daily",
       title        = "Medium Technology Greenhouse",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.hortidaily.com/images/2012/1221/as3.jpg",
       note         = "Online accessed 10-march-2017"}
 
@Misc {hightechnologygreenhouse,
       author       = "Sagh",
       title        = "High Technology Greenhouse",
       howpublished = "Online accessed 10-march-2017",
       url          = "http://www.sahgh.com/img/tomato-crop-on-gutter.jpg",
       note         = "Online accessed 10-march-2017"}                     
 
@Misc {fivemajormarketingcontroltechniques,
       author       = "Irene A. Blake",
       title        = "Five Major Marketing Control Techniques",
       howpublished = "Online accessed 15-march-2017",
       url          = "http://smallbusiness.chron.com/five-major-marketing-control-techniques-40619.html",
       note         = "Online accessed 15-march-2017"}
 
@Misc {greenhousecultivation,
       author       = "Agritech",
       title        = "Greenhouse Cultivation",
       howpublished = "Online accessed 11-march-2017",
       url          = "http://agritech.tnau.ac.in/horticulture/horti_Greenhouse%20cultivation.html",
       note         = "Online accessed 11-march-2017"} 
 
@Misc {supermarket,
       author       = "Ytimg",
       title        = "Supermarket",
       howpublished = "Online accessed 27-march-2017",
       url          = "https://i.ytimg.com/vi/OgKdf_dgnGM/maxresdefault.jpg",
       note         = "Online accessed 27-march-2017"} 
 
@Misc {indoorallotment,
       author       = "Daviddomoney",
       title        = "Indoor Allotment",
       howpublished = "Online accessed 27-march-2017",
       url          = "http://www.daviddomoney.com/wp-content/uploads/2014/10/indoor-allotment-gift-set.jpg",
       note         = "Online accessed 27-march-2017"}         
 
@Misc {cantinhodasaromaticas,
       author       = "Cantinho das Aromaticas",
       title        = "Cantinho das Aromaticas",
       howpublished = "Online accessed 27-march-2017",
       url          = "http://4.bp.blogspot.com/-j9j4ftnrXAM/UlLocYuyHjI/AAAAAAAAMgU/wE7W-c2JE_I/s1600/logotipo-rectangular.jpg",
       note         = "Online accessed 27-march-2017"}
 
@Misc {typesofgreenhouses,
       author       = "NSW",
       title        = "Types of Greenhouses",
       howpublished = "Online accessed 14-march-2017",
       url          = "http://www.dpi.nsw.gov.au/agriculture/horticulture/greenhouse/structures-and-technology/types",
       note         = "Online accessed 14-march-2017"} 
 
@Misc {heathconduction,
       author       = "John Worley",
       title        = "Conduction",
       howpublished = "Online accessed 16-march-2017",
       url          = "http://extension.uga.edu/publications/detail.cfm?number=B792#Conduction",
       note         = "Online accessed 16-march-2017"} 
 
@Misc {marketingmix,
       author       = "Marketing Teacher",
       title        = "Marketing Mix",
       howpublished = "Online accessed 28-march-2017",
       url          = "http://www.marketingteacher.com/marketing-mix/",
       note         = "Online accessed 28-march 2017"}
 
@Misc {thesimpleguidetogreenhouseirrigation,
       author       = "Crane Garden Buildings",
       title        = "The Simple Guide To Greenhouse Irrigation",
       howpublished = "Online accessed 10-march-2017",
       url          = "https://www.cranegardenbuildings.co.uk/articles/the-simple-guide-to-greenhouse-irrigation",
       note         = "Online accessed 10-march 2017"} 
 
@Misc {theculturalsignificanceofsustainability,
       author       = "Joshua J. Yates",
       title        = "The Cultural Significance of Sustainability",
       howpublished = "Online accessed 27-march-2017",
       year         = "2012",
       url          = "http://www.iasc-culture.org/THR/THR_article_2012_Summer_Yates.php",
       note         = "Online accessed 27-march 2017"} 
 
@Misc {environmentalsustainability,
       author       = "Thwink",
       title        = "Environmental Sustainability",
       howpublished = "Online accessed 27-march-2017",
       url          = "http://www.thwink.org/sustain/glossary/EnvironmentalSustainability.htm",
       note         = "Online accessed 27-march 2017"}
 
@Misc {expandedcork,
       author       = "Corklink",
       title        = "Expanded Cork",
       howpublished = "Online accessed 27-march-2017",
       url          = "http://www.thwink.org/sustain/glossary/EnvironmentalSustainability.htm",
       note         = "Online accessed 27-march 2017"}
 
@Misc {anontoxicalternativeforwaterproofingwood,
       author       = "Corklink",
       title        = "A Non Toxic Alternative for Waterproofing Wood",
       howpublished = "Online accessed 27-march-2017",
       url          = "http://www.timberprocoatings.com/wood-finishes/wood-stabilizer.html",
       note         = "Online accessed 27-march 2017"}
 
@book {perspektivendernachhaltigkeit,
       author    = "Arndt Hardtke, Marco Prehn",
       title     = "Perspektiven der Nachhaltigkeit",
       publisher = "Betriebswirtschaftlicher",
       year      = "2001"}   
 
@Misc {fruitandvegetableconsumptionineurope,
       author       = "Eufic",
       title        = "Fruit and vegetable consumption in Europe – do Europeans get enough?",
       howpublished = "Online accessed 30-march-2017",
       url          = "http://www.eufic.org/en/healthy-living/article/fruit-and-vegetable-consumption-in-europe-do-europeans-get-enough",
       note         = "Online accessed 30-march 2017"}                                       
 
@Misc {aerogardenproduct,
       author       = "Aerogarden",
       title        = "Aerogarden shop",
       howpublished = "Online accessed 31-march-2017",
       url          = "http://www.aerogarden.com/home-201702/?cid=ppc_m&offban=bing20&utm_campaign=BD+-+Solo+%26+Sites+-+EXCT+-+US48&utm_content=BD+-+AeroGarden+-+EXCT&utm_medium=cpc&utm_source=bing&utm_term=aerogarden",
       note         = "Online accessed 31-march 2017"}   
 
@Misc {step1and2,
       author       = "Aerogarden",
       title        = "Aerogarden shop",
       howpublished = "Online accessed 31-march-2017",
       url          = "http://www.aerogarden.com/media/mta/page4_step12.jpg",
       note         = "Online accessed 31-march 2017"}  
 
@Misc {step3,
       author       = "Aerogarden",
       title        = "Aerogarden shop",
       howpublished = "Online accessed 31-march-2017",
       url          = "http://www.aerogrow.com/overview/images/page4_step3.jpg",
       note         = "Online accessed 31-march 2017"}                                                                                                                                        
 
@Misc {technologie,
       author       = "Aerogarden",
       title        = "Aerogarden shop",
       howpublished = "Online accessed 31-march-2017",
       url          = "https://www.aerogrow.com/overview/images/page5_howdoesitwork.jpg",
       note         = "Online accessed 31-march 2017"} 
 
@Misc {tunnel,
       author       = "Serre jardin",
       title        = "Serres tunnel et maraicheres",
       howpublished = "Online accessed 31-march-2017",
       url          = "https://www.serre-jardin.com/serres-tunnel-et-maraicheres/2911-serre-maraichere-12-m-lams.html",
       note         = "Online accessed 31-march 2017"}
 
@Misc {glass,
       author       = "Serre jardin",
       title        = "Serres tunnel et maraicheres",
       howpublished = "Online accessed 31-march-2017",
       url          = "https://www.serre-jardin.com/serres-de-culture-en-verre/2643-serre-de-culture-verre-trempe-venus-6200-lams.html",
       note         = "Online accessed 31-march 2017"}
 
@Misc {watering,
       author       = "Serre jardin",
       title        = "Serres tunnel et maraicheres",
       howpublished = "Online accessed 31-march-2017",
       url          = "https://www.serre-jardin.com/accessoires-irrigation-serres/2884-systeme-d-arrosage-serre.html",
       note         = "Online accessed 31-march 2017"}
 
@Misc {dutchgreenhouses,
       author       = "Dutch Greenhouses",
       title        = "Venlo Greenhouse",
       howpublished = "Online accessed 1-april-2017",
       url          = "https://dutchgreenhouses.com/technology/venlo-greenhouse",
       note         = "Online accessed 1-april 2017"}
 
@Misc {hydroponics,
       author       = "Dutch Greenhouses",
       title        = "Hydroponics",
       howpublished = "Online accessed 1-april-2017",
       url          = "https://dutchgreenhouses.com/technology/hydroponics",
       note         = "Online accessed 1-april 2017"}       
 
@Misc {greenhousecanada,
       author       = "Greenhouse Canada",
       title        = "Low tech vegetables",
       howpublished = "Online accessed 1-april-2017",
       url          = "http://www.greenhousecanada.com/inputs/crop-culture/low-tech-vegetables-2067",
       note         = "Online accessed 1-april 2017"}       
 
@Misc {perlite,
       author       = "Perlite",
       title        = "Horticulture perlite",
       howpublished = "Online accessed 1-april-2017",
       url          = "https://www.perlite.org/industry/horticulture-perlite.html",
       note         = "Online accessed 1-april 2017"}   
 
@Misc {almeria,
       author       = "Almeria",
       title        = "Almeria",
       howpublished = "Online accessed 1-april-2017",
       url          = "http://2.bp.blogspot.com/-_LW89_DuuRs/UjFCqrPpO0I/AAAAAAAACRU/8uBMfl0Zj-Q/s1600/Massive+Greenhouses+of+Almeria+-+Spain+%286%29.jpg",
       note         = "Online accessed 1-april 2017"}
 
@Misc {thegreenhousesofalmeria,
       author       = "Amusing planet",
       title        = "The greenhouses of Almeria",
       howpublished = "Online accessed 1-april-2017",
       url          = "http://www.amusingplanet.com/2013/08/the-greenhouses-of-almeria.html",
       note         = "Online accessed 1-april 2017"}
 
@Misc {newyork,
       author       = "Garden in New York",
       title        = "Garden in New York",
       howpublished = "Online accessed 1-april-2017",
       url          = "https://c1.staticflickr.com/7/6158/6168291766_41c36f25db_z.jpg",
       note         = "Online accessed 1-april 2017"}
 
@Misc {conservatory,
       author       = "NYBEvents",
       title        = "Conservatory",
       howpublished = "Online accessed 1-april-2017",
       url          = "http://nybgevents.com/conservatory/",
       note         = "Online accessed 1-april 2017"}
 
@Misc {machinedirective,
       author       = "Europe",
       title        = "Machine Directive",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://ec.europa.eu/growth/sectors/mechanical-engineering/machinery/index_en.htm",
       note         = "Online accessed 3-april 2017"}      
 
@Misc {electromagneticcompatibilitydirective,
       author       = "Europe",
       title        = "Electromagnetic Compatibility Directive",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://ec.europa.eu/growth/sectors/electrical-engineering/emc-directive/index_en.htm",
       note         = "Online accessed 3-april 2017"}
 
@Misc {lowvoltagedirective,
       author       = "Europe",
       title        = "Low Voltage Directive",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://ec.europa.eu/growth/sectors/electrical-engineering/lvd-directive/index_en.htm",
       note         = "Online accessed 3-april 2017"}
 
@Misc {radioequipmentdirective,
       author       = "Europe",
       title        = "Radio Equipment Directive",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://ec.europa.eu/growth/sectors/electrical-engineering/rtte-directive/index_en.htm",
       note         = "Online accessed 3-april 2017"}
 
@Misc {restrictionofhazardoussubstances,
       author       = "Europe",
       title        = "Restriction of Hazardous Substances (ROHS)",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://ec.europa.eu/environment/waste/rohs_eee/legis_en.htm",
       note         = "Online accessed 3-april 2017"}
 
@Misc {internationalsystemofunits,
       author       = "Europe",
       title        = "International System of Units",
       howpublished = "Online accessed 3-april-2017",
       url          = "http://physics.nist.gov/cuu/pdf/sp811.pdf",
       note         = "Online accessed 3-april 2017"}