S. Suharti, D. A. Astuti, E. Wina, and T. Toharmat, “Digestibility, Fermentation Characteristic, Protein Microbial Synthesis and Growth Performance of Beef Cattle Fed High Forage Ration with Lerak Extract Supplementation”, Pak. J. Nutr., vol. 14, no. 12, pp. 885–891, Nov. 2015, doi: 10.3923/pjn.2015.885.891.