Petrus, H. T. B. M., Sari, D. P., Yuliansyah, A. T., Mufakhir, F. R., Astuti, W., Iskandar, Y., Bratakusuma, D., & Virdhian, S. (2019). Manganese Recovery from Hydrocracking Spent Catalyst Using Citric Acid and Its Kinetics. International Series on Interdisciplinary Science and Technology, 4(2), 226–230. Retrieved from http://insist.unila.ac.id/index.php/ojs/article/view/164