1. AOAC, 1984. Official Methods of Analysis. 14th ed. AOAC, Washington, DC, pp. 129–130
2. ARC, 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Farnham Royal, UK
3. Contribution of visceral organs to animal energy expenditures;Ferrell;J. Anim. Sci.,1988
4. Visceral oxygen consumption during chronic restriction and realimentation in sheep;Freetly;J. Anim. Sci.,1995
5. Effects of supplementing moderate- to low-quality grass hay with maize and(or) rumen undegradable protein on growth of wethers;Galloway;Small Rumin. Res.,1996