Suryani, H., Zain, M., Ningrat, R., & Jamarun, N. (2015). Supplementation of Direct Fed Microbial (DFM) on in vitro Fermentability and Degradability of Ammoniated Palm Frond. Pakistan Journal of Nutrition, 15(1), 89–94. https://doi.org/10.3923/pjn.2016.89.94