(1)
Petrus, H. T. B. M.; Sari, D. P.; Yuliansyah, A. T.; Mufakhir, F. R.; Astuti, W.; Iskandar, Y.; Bratakusuma, D.; Virdhian, S. Manganese Recovery from Hydrocracking Spent Catalyst Using Citric Acid and Its Kinetics. INSIST 2019, 4, 226-230.