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3http://www.utcpower.com.
4Wikipedia. Type 212 submarine. http://en.wikipedia.org/wiki/Type_212_submarine, 30 Nov. 2009.
5Cute (Clean Urban Transportation for Europe) Detailed Summary of Archievements, http://ec.europa.eu/energy/res/fp6_projects/doc/hydrogen/deliverables/summary.pdf.
6Hyfleet: CUTE Hydrogen transportation-Bus technology &fuel for today and for a sustainable future. http://hyfleetcute.com/data/HyFLEETCUTE_Brochure_Web.pdf.
7General Motors Announces New Fuel Cell System. http://www.fuelcelltoday.com/online/news/articles/2009-09/General-Motors-Announces-New-Fue.
8Mercedes-Benz F-CELL World Drive – the finale. Succesful finish: F-CELL World Drive reaches Stuttgart after circling the globe. http://fuelcellsworks.com/news/2011/06/02/.
9UTC Fuel Cell Transit Bus Sets Record. http://evworld.com/news.cfm?newsid=26282.
