3Choi E,Rhu D,Yun Z,et al.Temperature effects on biological nutrient removal system with weak municipal wastewater. Water Science and Technology . 1998
4J.H. Rensink and W.H. Rulkens.Using metazoa to reduce sludge production. Water Science and Technology . 1997
5C. H. Ratsak,S. A. L. M. Koouman and B. W. Kooi.Modelling the growth of an oligochaete on activated sludge. Water Research . 1993
