1. Adams, C.E. Jr. and Eckenfelder, W.W. Jr. 1981.Sludge Treatment, Edited by: Eckenfelder, W.W. and Santhanam, C.J. 279–305. N.Y.: Maneel Dekker, Inc.
2. Randall, C.W., Moore, H.R. and King, P.H. Proceedings. 5th Mid‐Atlantic Industrial Waste Conference. Philadelphia, PA: Drexel University.
3. Comparison of Aerobic and Anoxic-Aerobic Digestion of Waste Activated Sludge