1. A unified approach to activated sludge design;Goodman;J. Wat. Pollut. Control Fed.,1974
2. Unified basis for biological treatment design and operation;Lawrence,1970
3. Kinetics of substrate removal by activated sludge;Grau;Vod. Hospod.,1970
4. Linear substrate removal in the activated sludge process;Tischler,1969
5. Factors affecting efficiency and solids production in the activated sludge process;Wuhrmann,1957