1. and “The Anaerobic Filter for Waste Treatment,” Technical Report No. 87, Department of Civil Engineering, Stanford University, Stanford, Ca., 1968.
2. and “Nitrification in Rotating Biological Contactors,” presented at the 51st Annual Conference WPCF, Anaheim, Ca, 1978.
3. “Nitrification on Rotating Biological Contactors,” Department of Environmental Engineering, The Technical University of Denmark, LtH 82-42, 1982.
4. and “Kinetics and Simulation of Nitrification in a Rotating Biological Contactor,” presented at the 1st International Conference on Fixed-Film Biological Processes, Kings Island Oh., 1982.
5. Scanning electron microscope evaluation of rotating biological contactor biofilm