Khampa, Sittisak, Pala Chaowarat, Rungson Singhalert, and Metha Wanapat. 2009. “Supplementation of Malate and Yeast in Concentrate Containing High Cassava Chip on Rumen Ecology in Dairy Steers”. Pakistan Journal of Nutrition 8 (5): 592–596. https://doi.org/10.3923/pjn.2009.592.596.