1. Standard Methods for the Examination of Water and Wastewater;APHA,1980
2. Anaerobic sludge digestion—MOP 16;Bargman;J. Wat. Pollut. Control Fed.,1966
3. Microbial methane production—theoretical aspects;Bryant;J. Anim. Sci.,1979
4. Effect of retention time and feed substrate concentration on methanogenesis in anaerobic digestion;Chang,1982
5. Effect of pH on methanogenesis in anaerobic digestion;Chang,1983