M. Z. Mubarok and M. W. Fathoni, “Studi Kinetika Pelindian Bijih Nikel Limonit Dari Pulau Halmahera Dalam Larutan Asam Nitrat [Kinetics Study of Nickel Limonite Ore Leaching from Halmahera Island in Nitric Acid Solution]”, Metalurgi, vol. 31, no. 1, pp. 59–68, Apr. 2016.