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Colella، W.G. (أكتوبر 2005). "Switching to a U.S. hydrogen fuel cell vehicle fleet: The resultant change in emissions, energy use, and greenhouse gases". Journal of Power Sources. ج. 150 ع. 1/2: 150–181. Bibcode:2005JPS...150..150C. DOI:10.1016/j.jpowsour.2005.05.092.
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Colella، W.G. (أكتوبر 2005). "Switching to a U.S. hydrogen fuel cell vehicle fleet: The resultant change in emissions, energy use, and greenhouse gases". Journal of Power Sources. ج. 150 ع. 1/2: 150–181. Bibcode:2005JPS...150..150C. DOI:10.1016/j.jpowsour.2005.05.092.