WASET
    Y. Alqaheem and  A. Alomair and  F. Altarkait and  F. Alswaileh and  Nusrat Tanoli,  Fabrication of a High-Performance Polyetherimide Membrane for Helium Separation.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2019, vol. 154(10). 498 - 502
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/10010844.