Fukuta, T, T Ito, K Sawada, Yoshihiro Kojima, Elleen C Bernardo, Hitoki Matsuda, and K Yagishita. 2004. “Separation of Nickel Fom Plating Solution by Sulfuration Treatment”. ASEAN Journal of Chemical Engineering 4 (2), 24-31. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7620.