Mokri, N.A., P.C. Oh, H. Mukhtar, and T.L. Chew. 2017. “Synthesis of High Molecular Weight Polyimide Consisting Hexafluoroisopropylidene Moiety for Gas Separation”. Journal of Mechanical Engineering and Sciences 11 (4):3144-51. https://doi.org/10.15282/jmes.11.4.2017.17.0283.