1. Biological Waste-water Treatment System Design. Part 1. Optimal Synthesis;Mishra;Can. J. Chem. Eng.,1973
2. City of San Buenaventura, “Integrated Activated Sludge Biological Filter Process,” Report to EPA, Water Pollution Control Research Series, No. 17050EE003/71, (March 1971).
3. Roesler, J. F. and Smith, R., Proc. 24th Ind. Waste Conf., Purdue Univ., Engrg. Extn. Ser., No. 135 550 (1969).