Al Fatony, Z., A. H. Resha, G. P. Persada, I. Makertihartha, M. L. Gunawan, and S. Subagjo. “Effects Of Cu On The Modified Co-Based Catalyst Activity For Fischer-Tropsch Synthesis”. ASEAN Journal of Chemical Engineering, Vol. 18, no. 1, June 2018, pp. 60-67, https://dev.journal.ugm.ac.id/v3/AJChE/article/view/9015.