Faizan Ahmad and  Lau Kok Keong and  Azmi Mohd. Shariff,  Modeling and Parametric Study for CO2/CH4 Separation Using Membrane Processes.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2010, vol. 48(12). 766 - 771
    [viewed 18 May 2022]. Available from: https://publications.waset.org/pdf/9428.