1. 1991. These results were presented at the 6th International Symposium on Wood and Pulping Chemistry. April 29-May 31991, Melbourne, Australia.
2. Rapson, W. H. and Spinner, I. H. 1979.The Bleaching of Pulp, 3rd ed., Edited by: Singh, R. P. 358Atlanta: Tappi Press.
3. Aspects of photosensitized lignin oxygenation