1. Alarcón, Z.B., 1995. Cambios de peso de novillos en pastoreo de estrella africana y banco de proteı́na de Kudzu en condiciones tropicales. Tesis de Maestrı́a en Ciencias, Colegio de Postgraduados, Montecillo, Mexico.
2. AOAC, 1980. Official Methods of Analysis, 13th edn. Association of Official Analytical Chemists, Washington, DC.
3. Escape protein for beef cows: III. Performance of lactating beef cows grazing smooth brome or big bluestem;Blasi;J. Anim. Sci.,1991
4. Carulla, J.F., 1990. Selectivity and intake of animals grazing an association of Arachis pintoi with Brachiaria dictyoneura in the savannas of Colombia. M.Sc. Thesis, University of Nebraska, Lincoln.
5. CIAT, 1989. Calidad y productividad de pasturas. En: Informe Anual Pastos Tropicales. CIAT, Cali, Colombia.