1. M. Henze, C. P. L. Grady, G. W. Jr., G. V. R. Marais, and T. Matsuo, “Activated sludge model no.1,” IAWQ Scientific and Technical Report No.1, London, techreport 1, 1987.
2. M. Henze, W. Gujer, T. Mino, T. Matsuo, M. C. M. Wentzel, and G. V. R. Marais, “Activated sludge model no.2,” IAWQ Scientific and Technical Report No.3, London, techreport 2, 1995.
3. Activated Sludge Model No.2d, ASM2D
4. Activated Sludge Model No. 3
5. Reduced Order Models for On-Line Parameter Identification of the Activated Sludge Process