Wirawan, S. K., I. N. Indrajati, W. B. Sediawan, and P. Mulyono. “CO2 Adsorption on HZSM-5 Zeolite : Mass Transport Study in A Packed Bed Adsorber”. ASEAN Journal of Chemical Engineering, Vol. 8, no. 1, Dec. 2008, pp. 38-50, https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7697.