S. Khampa, S. Ittharat, and U. Koatdoke, “Enrichment Value of Yeast-malate Fermented Cassava Pulp and Cassava Hay as Protein Source Replace Soybean Meal in Concentrate on Rumen Ecology in Crossbred Native Cattle”, Pak. J. Nutr., vol. 10, no. 12, pp. 1126–1131, Nov. 2011, doi: 10.3923/pjn.2011.1126.1131.