1. Official Methods of Analysis;AOAC,1990
2. Method of determining and expressing fineness of feed material by sieving;ASAE,1983
3. Wafers, pellet, crumbles-definitions and methods for determining density, durability, and moisture content. ASAE Standard S269.3;ASAE,1987
4. Factors affecting pellet quality;Behnke,1994
5. In vitro enzymatic determination of the protein nutritional value and the amount of available lysine in extruded cereal-based products;Björk;Agric. Biol. Chem.,1985