Sulistyo, Hary, Suprihastuti Sri Rahayu, Wahyudi B Sediawan, Sarto Sarto, and Takdir Syarif. 2009. “Kinetics of Ferrous Sulfate Catalytic Oxidation from Dissolved Iron Waste in Sulfuric Acid”. ASEAN Journal of Chemical Engineering 9 (2), 49-56. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/8058.