Wanapat, Metha, et al. “Effects of Supplementation of Yeast-Malate Fermented Cassava Chip As a Replacement Concentrate on Rumen Fermentation Efficiency and Digestibility of Nutrients in Cattle”. Pakistan Journal of Nutrition, vol. 8, no. 4, Mar. 2009, pp. 447–451, https://doi.org/10.3923/pjn.2009.447.451.