1. Wiśniewski J, Selected problems of industrial wastes purification by membran methods” Conference materials “Membrans and membran technics in industry: a current stage and a progress”, 6–8 May, 2002. Jahranka, Poland, 2002. p. 233–54.
2. 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, Journal of Law No. 116, item 501.
3. Performance characteristic of reserve osmosis, nonfiltration and ultrafiltration spiral wound permeates — Osmonics.
4. User’s manual, Photometer SQ 118, Merck.
5. User’s manual, Determination of BZT using respirometric method, Oxi Top, firm WTW.