Febrina, D., Jamarun, N., Zain, M., & Khasrad. (2016). The Effects of P, S and Mg Supplementation of Oil Palm Fronds Fermented by Phanerochaete chrysosporium on Rumen Fluid Characteristics and Microbial Protein Synthesis. Pakistan Journal of Nutrition, 15(3), 299–304. https://doi.org/10.3923/pjn.2016.299.304