Rajendran, V., S. M. Saufi, M. A. K. Zahari, and A. W. Mohammad. “Study on Stripping Phase Conditions on the Levulinic Acid Extraction Using Supported Liquid Membrane”. Journal of Mechanical Engineering and Sciences, Vol. 13, no. 3, Sept. 2019, pp. 5625 -36, doi:10.15282/jmes.13.3.2019.25.0451.