1. ANSI, ASTM., 1977. Standard test methods for lignin wood. D 1103. American National Standard
2. Mineralization and humification pathways in two composting processes applied to cotton wastes;Baca;Journal of Fermentation and Bioengineering,1992
3. Measurement of carbohydrates in soil hydrolyzates with anthrone;Brink;Soil Science,1959
4. Browning, B.L., 1967. Methods of Wood Chemistry. Interscience Publishers, New York, USA, p. 395
5. Dell'Agnola, G., Nannipieri, P., Nardi, S., 1993. Sostanza organica e molecole umiche. In: Ciclo della Sostanza Organica nel suolo: Aspetti Agronomici, Chimici, Ecologici e Selvicolturali. Nannipieri, P. (Ed.), Patron Editore, Bologna, 21–39