Salleh, W.N.W., N. Sazali, and A.F. Ismail. 2014. “Separation of CO2/CH4 through Carbon Tubular Membranes: Effect of Carbonization Temperature”. Journal of Membrane and Separation Technology 3 (4):219-23. https://doi.org/10.6000/1929-6037.2014.03.04.5.