1. Experiences on Instrumentation and Control of Activated Sludge Plants - a Microprocess or Application;Aarinen,1978
2. Dynamic Models and Control Steategies for Wastewater Treatment Plants - an Overview;Andrews,1977
3. Estimation and Control of Biological Activity in the Activated Sludge Process Using Dissolved Oxygen Measurements;Andrews,1977
4. Linear Optimal Control Systems;Kwakernaak,1972
5. Reduced-Order Modelling for Activated Sludge Treatment Process;Marsili-Libelli;Ecological Modelling Journal,1979