WASET
    Asad Hanif and  Pavithra Parthasarathy and  Zongjin Li,  Utilizing Fly Ash Cenosphere and Aerogel for Lightweight Thermal Insulating Cement-Based Composites.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 84 - 90
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10006243.