1. Lignin chemistry-past, present, and future;Adler;Wood Sci. Technol,1980
2. Alen, R., 2000. Structure and chemical composition of wood. In: Stenius, P. (Ed.), Papermaking Science and Technology, vol. 3. Finland, p. 40.
3. Argyropoulos, D.S., Akim, L., Ahvazi, B., 2000. Salient reactions in lignin during pulping and oxygen delignification. In: Proceedings of the TAPPI Pulping/Process and Product Quality Conference, Boston, MA, November, pp. 984–994.
4. Quantitative phosphorous-31 NMR analysis of six soluble lignins;Argyropoulos;J. Wood Chem. Technol,1994
5. Delignification studies—factors effecting the amount of residual lignin;Axegard;Svensk Papperstidning,1983