Varela, G., J. Boza, y J. Fonolla. «Experiences of Digestibility and Nutritional Performance of Corn, Sorghum and Barley in Economical Diets for Pigs in Precocious Bait». Ars Pharmaceutica (Internet), vol. 8, n.º 1-2, diciembre de 1966, pp. 7-34, https://revistaseug.ugr.es/index.php/ars/article/view/7659.