P. K. Tahuk, S. P. S. Budhi, Panjono, and E. Baliarti, “In vitro Characteristics of Rumen Fermentation of Fattening Rations with Different Protein-energy Levels Fed to Bali Cattle”, Pak. J. Nutr., vol. 15, no. 10, pp. 897–904, Sep. 2016, doi: 10.3923/pjn.2016.897.904.