Norazlianie Sazali, et al. “PI/NCC-Based/Tubular/Carbon/Membrane:/Influence/of/Aging/Times/towards/Oxygen/Separation/Performance”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 51, no. 2, Mar. 2024, pp. 187-96, https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2932.