1. Rich, L. G.: Unit operations of sanitary engineering. New York: John Wiley&Sons 1961
2. Fitch, B.: Batch tests predict thickener performance. Chemical Engineering 23 (1971) 83
3. Shannon, P. T.; Dehaas, R. D.; Stroupe, E. P.; Elmer, M. T.: Batch and continuous thickener. I&EC Fundamentals 2 (1964) 250
4. Robins, W. H. M.: The theory of the design and operation of settling tanks. Trans. Instn. Chem. Engrs 42 (1964) T158
5. Wilson, F.: Design calculations in wastewater treatment. E&F.N Spon Ltd. 1981