1. 1) Kadlec, R. H. and Knight, R. L.: Treatment Wetlands, 1st ed., Lewis Publishers, Inc., 1996.
2. 2) Reed, S. C., Middlebrooks, E. J. and. Crites, R. W: Natural Systems for Waste Management and Treatment, McGraw-Hill Inc., New York, 1988, in Metcalf & Eddy: Wastewater Engineering: Treatment, Disposal, Reuse, McGraw-Hill International Editions, 3rd edition, 1991.
3. 3) Water Pollution Control Federation (WPCF): Manual of Practice: Natural Systems for Wastewater Treatment, Manual of Practice FD-16, Chapter 13: Wetland Systems, Alexandria, VA, 1990.
4. 4) Hammer, D. A.: Creating Freshwater Wetlands, 2nd Edition. Lewis Publishers, Inc., New York, 1997.
5. 5) Campbell, K. L. (ed.): Versatility of Wetlands in the Agricultural Landscape, Proceedings of the National Symposium, Tampa, Florida, September 17-20, American Society of Agricultural Engineers (ASAE), 1995.