Khampa, Sittisak, Pala Chaowarat, Uthai Koatdoke, Rungson Singhalert, and Metha Wanapat. 2009. “Manipulation of Rumen Ecology by Malate and Cassava Hay in High-Quality Feed Block in Dairy Steers”. Pakistan Journal of Nutrition 8 (6): 814–817. https://doi.org/10.3923/pjn.2009.814.817.