1. Kirk-Othmer Encyclopedia of Chemical Technology, John Wiley & Sons, New York, 4th edn., 1998, vol. 25, pp. 627–664
2. FAO Yearbook of Forest Products 2003, FAO Forestry Series No. 38 and Statistics Series No. 185, Food and Agriculture Organization of the United Nations, Rome, Italy, 2005
3. Kirk-Othmer Encyclopedia of Chemical Technology, John Wiley & Sons, New York, 4th edn., 1996, vol. 20, pp. 494–582
4. Profile of the Pulp and Paper Industry, EPA Office of Compliance Sector Notebook EPA/310-R-02-002, US Environmental Protection Agency, Washington, DC, 2nd edn., 2002
5. S. K. Black , B. R.Hames and M. D.Myers, US Pat., 5 730 837, 1998