1. Biological sewage treatment in sewage lines—simulation of plug flow reactor with step feeding;Green;Thesis,1979
2. Sludge viability in a biological reactor;Green;Water Res.,1981
3. Use of PPT in wastewater reclamation;Irvine Ranch Water District, Irvine, CA,1974
4. Use of pipelines as aerobic biological reactors;Koch;J. Wat. Pollut. Control Fed.,1973
5. Oxygen supply as the limiting factor in activated sludge purification;Pasveer,1955