1. Regulation of the Ministry of Environmental Protection, Natural Resources and Forestry dated 5 November 1991 on the classification of waters and conditions the sewage discharged to waters and soil should satisfy, J. Law, No. 116, item 501.
2. Treatment of wastewater from meat industry using hybrid processes;Bohdziewicz,2001
3. Treatment of wastewater from meat industry applying the process of direct chemical precipitation combined with pressure driven membrane techniques;Bohdziewicz,2001
4. Performance characteristic of reserve osmosis, nonfiltration and ultrafiltration spiral wound permeates, Osmonics.
5. User's Manual, Photometer SQ 118, Merck.