Ngozi Nwogu and  Edward Gobina,  Gas Permeation Behavior of Single and Mixed Gas Components Using an Asymmetric Ceramic Membrane.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2015, vol. 102(6). 689 - 693
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10001725.