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BIORESOURCE TECHNOLOGY, vol. 99, no. 17, page. 8485 - 8491, 2008-11
BIORESOURCE TECHNOLOGY, vol. 99, no. 14, page. 6666 - 6672, 2008-09
JOURNAL OF ENVIRONMENTAL MANAGEMENT, vol. 88, no. 3, page. 564 - 575, 2008-08