BIORESOURCE TECHNOLOGY, vol. 101, no. 9, page. 2945 - 2951, 2010-05
Environmental Technology (United Kingdom), vol. 34, no. 19, page. 2769 - 2776, 2013-10-01
ENVIRONMENTAL ENGINEERING SCIENCE, vol. 26, no. 6, page. 1131 - 1138, 2009-06