1. Finney, B. A. and Middlebrooks, E. J.: 1980, J. Water Poll Control Fed. 52, 134.
2. Hosetti, B. B. and Patil, H. S.: 1987, Water, Air, and Soil Pollut. 34, 199.
3. Mangelson, K. A. and Walters, G. Z.: 1977, J. San. Eng. Div., Amer. Soc. Civil Eng. 98, 9.
4. Mara, D. D. and Pearson, H.: 1986, Biotechnology, H. J. Rehm and G. Reed (eds.), 8, 178.
5. Mara, D. D. and Pearson, H.: 1987, Waste Stabilization Ponds: Design Manual for Mediterranean Europe: WHO, 6.