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Barometr Regionalny. Analizy i prognozy > 2015 > 1(39) > 21-25
Environmental Biotechnology > 2014 > Vol. 10, No. 2 > 80--85
Renewable and Sustainable Energy Reviews > 2005 > 9 > 1 > 101-110
Renewable and Sustainable Energy Reviews > 2003 > 7 > 6 > 545-552