1. U.S. EPA, Toxic Release Inventory (TRI) Program, 2005, http://www.epa.gov/tri.
2. United States Environmental Protection Agency. Fact Sheet: EPA's Final Pulp, Paper, and Paperboard “Cluster Rule”—Overview, EPA-821-F-97-010, 1997.
3. Pollution Prevention and Abatement: Pulp and Paper Mills. Technical Background Document,1998
4. Industrial Environmental Control: Pulp and Paper Industry;Springer,2000