L. Wong and  H. Asrah and  M.E. Rahman and  M.A. Mannan,  Effects of Aggressive Ammonium Nitrate on Durability Properties of Concrete Using Sandstone and Granite Aggregates.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 49 - 53
    [viewed 09 April 2020]. Available from: https://publications.waset.org/pdf/6550.