1. Efectos de la melaza sobre el consumo de pasto en bovinos;Beaudouin;MS Thesis, Instituto Interamericano de Ciencias Agricolas (IICA),1968
2. Multi factor Experimental Designs;Box;Ann. Math. Stat.,1957
3. Effect of soybean meal, raw soybeans, corn gluten feed and urea on the concentration of rumen fluid components at intervals after feeding;Davis;J. Dairy Sci.,1967
4. Data presented at “Curso intensivo de fisiología de la producción con énfasis en bovinos;Johnson,1973
5. The Fire of Life;Kleiber,1961