1. Assessment of sludge conditionability using rheological properties;Campbell,1983
2. CEN/TC308, 1995. Usefulness of rheological characterization in sludge management. Report CEN/TC308/WG2-N25.
3. Dick, R.I., 1965. Applicability of prevailing gravity thickening theories to activated sludge. Ph.D. Thesis, University of Illinois, Urbana, (ILL-USA).
4. The rheology of activated sludge;Dick;J.W.P.C.F.,1967
5. A study of the rotating cylinder sludge collector in the dissolved air flotation process;Geinopolos;J.W.P.C.F.,1964