1. ANSI, 1982. Basic Hardboard. ANSI/AHA 135.4 (reaffirmed January, 1988). American National Standard, American Hardboard Association, Palatine, IL
2. ASTM, 1982. Standard methods of evaluating the properties of wood-base fiber and particle panel materials. ASTM D 1037-38. American Society for Testing and Materials, Philadelphia, PA
3. AOAC, 1984. Official Methods of Analysis, 12th ed. Association of Official Analytical Chemists, Washington, DC
4. Goering, H.K., Van Soest, P.J., 1970. Forage Fiber Analysis. Agricultural handbook No. 379, US Department of Agriculture, Washington, DC
5. Studies on the mechanism of alkaline peroxide delignification of agricultural residues;Gould;Biotech. Bioeng.,1984