WASET
    Paul Onyegbule and  Harjit Singh,  An Investigation into Sealing Materials for Vacuum Glazing.   journal   = {International Journal of Structural and Construction Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2018, vol. 138(6). 622 - 625
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10009114.