1. Pulp and Paper: Chemistry and Chemical Technology, 3rd edition, J.P. Casey, editor, John Wiley and Sons, New York, 1979–1981, volumes 1–3
2. Kirk-Othmer Encyclopedia of Chemical Technology, 3rd edition, John Wiley and Sons, New York, 1982, volume 19
3. E. Horntvedt, A Sodium-base Sulfite Recovery Process Based on Pyrolysis, TAPPI 53 (11), 2147, Nov. 1970
4. Pulp production: Sprucing up Old Technology, Chem. Eng. News 55(21), 26, May 26, 1980
5. J.P. Hanson, No-sulfur Pulping Pushing Out NSSC Process at Corrugating Medium Mills, Pulp and Paper 52 (3), 116, March 1978