1. Lohiniva, E., Mäkinen, T. and Sipilä, K. 2001. “Sludge treatment. New and presently employed technologies”. Espoo, Finland: Technical Research Centre of Finland, VTT Research Notes 2081. 147 p. + app. 14 p
2. Hynninen, P. 1998.Papermaking, Science and Technology: Environmental Control234Helsinki, Finland: Fabet Oy.
3. Spinosa, L. and Vesilind, P.A. (edited). 2001.Sludge into Biosolids: Processing, Disposal, Utilization394London, UK: IWA Publishing.
4. DEWATERING OF WASTE ACTIVATED SLUDGE VIA CENTRIFUGAL FIELD
5. SLUDGE DEWATERING AND DRYING