WASET
    Fazeera Ujin and  Kamran Shavarebi Ali and  Zarina Yasmin Hanur Harith,  Viability of Eggshells Ash Affecting the Setting Time of Cement.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2016, vol. 111(3). 342 - 346
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10003962.