Awan, J. A., C. Coquelet, M. Dicko, and Z.- ul H. Rizvi. “Phase Equilibrium of CO2 and Organic Sulfur Species in Methyldiethanolamine (MDEA) Aqueous Solution; Study of Acid Gases Loading Effect on the Partition Coefficient of N-Propylmercaptan”. Journal of the Pakistan Institute of Chemical Engineers, vol. 39, no. 1, Apr. 2011, pp. 1-8, http://www.piche.org.pk/journal/index.php/jpiche/article/view/28.