1. Ekono. (2002). Environmental performance, regulations and technologies in the pulp and paper industry, 728 pp. Ekono/Duoplan Strategy Study.
2. Finnish Standard Association. (1997). SFS-EN Standard 1485. Water quality. Determination of adsorbable organically bound halogens (AOX), 20 pp. Helsinki, Finland: Finnish Standard Association.
3. Finnish Standard Association. (1998a). SFS-EN Standard 1899-1. Water quality. Determination of biological oxygen demand after n days (BODn). Part 1: Dilution and seeding method with allylthiourea addition (ISO 5815: 1989, modified, 24 pp. Helsinki, Finland: Finnish Standard Association.
4. Finnish Standard Association. (1988b). SFS-EN Standard 5505. Determination of inorganic and organic nitrogen in waste water. Modified Kjeldahl method, 4 pp. Helsinki, Finland: Finnish Standard Association.
5. Finnish Standard Association. (1988c). SFS Standard 5504. Determination of chemical oxygen demand (CODcr) in water with the closed tube method. Oxidation with dichromate, 4 pp. Helsinki, Finland: Finnish Standard Association.