Dugos, N. P., N. P. Cabigon, and Y. P. Brondial. “Effect of MgCI2 and CaCI2 on the Bubble Point of Mixed- Solvents (Toluene-Isopropyl Alcohol-H20 System)”. ASEAN Journal of Chemical Engineering, Vol. 6, no. 2, Dec. 2006, pp. 98-103, https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7669.