Suhartati F, Suryapratama W. Increasing the In Vitro Enzymatic Activity of Cellulase and Amylase from Beef Cattle Rumen Fluid Supplemented with Moringa oleifera Leaves and Sulfur. Pak. J. Nutr. 2017;16(8):571–576. doi:10.3923/pjn.2017.571.576