1. American Feed Manufacturers Association (AFMA), 1972. Dehulled soybean meal. AFMA feed ingredient guide. American Feed Manufacturers Association, Arlington, VA, p. 91
2. Radiation treatment of laboratory animal feed;Adamiker;Z. Tierphysiol. Tierernahrung u. Futtermittelkunde,1978
3. A.O.A.C. Official Methods of Analysis, 1980. Association of Official Analytical Chemists. Washington, DC, USA
4. A.O.A.C. Official Methods of Analysis, 1984. Association of Official Analytical Chemists. Washington, DC, USA
5. An evaluation of urease activity test for determining the quality of soybean oil meal;DeSchrijver;Vloams Diergennesked. Tijschr,1977