1. Factors affecting forage intake by range ruminants: A review;Allison;J. Range Manage.,1985
2. Calidad de la dieta seleccionada al pastoreo por alpacas;Barcena;Univ. Nac. Tec. Altiplano, Puno (B.S. Thesis),1977
3. Estudio comparativo de la digestibilidad de la materia seca y fibra cruda entre alpacas y ovinos (in vivo) e (in vitro);Bardales;Fac. Med. Vet., Univ. Nac. Mayor de San Marcos, Lima (B.S. Thesis),1969
4. The Energy Metabolism of Ruminants;Blaxter,1963
5. Dry season forage selection by alpaca (Lama pacos) in southern Peru;Bryant;J. Range Manage.,1984