WASET
    R. Hela and  L. Bodnarova,  Observation and Experience of Using Mechanically Activated Fly Ash in Concrete.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2013, vol. 83(11). 864 - 867
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/17412.