1. Standard Methods for the Examination of Water and Wastewater;APHA,1985
2. Denitrification of high nitrate wastes using an anaerobic filter;Anderson,1978
3. High denitrification of concentrated nitrate wastewater;Bode;Wat. Sci. Technol.,1987
4. Denitrification in natural waters;Brezonik;Prog. Wat. Technol.,1977
5. Biological denitrification in rotating disc system;Cheung,1978