1. Holdup and dispersion: tracer residence times, moments and inventory measurements
2. Chapra S. C. and Canale R. P. (1988). Numerical methods for engineers . McGraw-Hill Book Co. Inc. New York N.Y.
3. Grady C. P. L. Jr. and Lim H. C. (1981). Biological wastewater treatment . Marcel Dekker Inc. New York N.Y.
4. Humenick M. J. Jr. (1977). Water and wastewater treatment . Marcel Dekker Inc. New York N.Y.
5. Johnson N. L. Kotz S. and Balakrishnan N. (1994). Continuous univariate distributions . Wiley Interscience New York N.Y.