Mahdi Alsagour and  Sam Ramrattan,  Comparing the Durability of Saudi Silica Sands for Use in Foundry Processing.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2019, vol. 155(11). 520 - 526
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/10010876.