Abrar, B., M. Halali, and A. Pourfathi. “Recovery of Nickel from Reformer Catalysts of Direct Reduction, Using the Pressurized Dissolving Method in Nitric Acid”. Engineering, Technology & Applied Science Research 6, no. 5 (October 23, 2016): 1158–1161. Accessed April 6, 2025. https://mail.etasr.com/index.php/ETASR/article/view/731.