1. Association of Official Analytical Chemists (AOAC) (1984 ) Official Methods of Analysis . Association of Official Analytical Chemists, Arlington, VA, 1141 pp.
2. The influence of cellulose filler on feeding, growth and utilization of protein and energy in rainbow trout, Salmo gairdnerii Richardson
3. K.A. Gomez, and A.A. Gomez (1976 ) Statistical Procedures for Agricultural Research with Emphasis on Rice . IRRI, Laguna, Philippines, 294 pp.