H. Harmini, D. Evvyernie, P. D. M. H. Karti, and Y. Widiawati, “Evaluation of Mineral Contents in Milk of Dairy Cattle Fed Elephant Grass Planted at Ex-Coal Mining Land”, Trop. Anim. Sci. J., vol. 43, no. 4, pp. 322–330, Dec. 2020, doi: 10.5398/tasj.2020.43.4.322.