1. Biological Process Design for Wastewater Treatment;Benefield,1980
2. Relationships between biological solids retention time and settling characteristics of activated sludge;Bisogni;Wat. Res.,1971
3. The influence of process variables on secondary clarification;Chapman;J. Wat. Pollut. Control Fed.,1983
4. Multi-process biological treatment model;Christensen;J. Wat. Pollut. Control Fed.,1975
5. Algorithm for optimal activated sludge design;Craig;J. envir. Engng, Am. Soc. civ. Engrs,1978