BIOCHEMICAL ENGINEERING JOURNAL, vol. 15, no. 2, page. 93 - 99, 2003-08
PROCESS BIOCHEMISTRY, vol. 38, no. 12, page. 1685 - 1693, 2003-07-31
WATER RESEARCH, vol. 37, no. 10, page. 2467 - 2477, 2003-05
WATER RESEARCH, vol. 37, no. 9, page. 2228 - 2232, 2003-05