N. P. Dugos, 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 J. Chem. Eng., vol. 6, no. 2, pp. 98-103, Dec. 2006.