1. Wheat straw treated with urea as a source of ammonia: chemical composition traits and in vivo digestibility;Antongiovanni;Zootech. Nutr. Anim.,1989
2. Estimation of the duodenal amino acid supply in ruminants by amino acid analysis of the products of fermentation in vitro;Dennison;S. Afr. J. Anim. Sci.,1983
3. Urea as a source of ammonia for improving the nutritive value of wheat straw;Dias-da Silva;Anim. Feed Sci. Technol.,1986
4. Forage fiber analysis (apparatus, reagents, procedures and some applications);Goering,1970
5. The value of urea treated straw in diets of lactating goats;Hadjipanayiotou;Anim. Feed Sci. Technol.,1984