B. M. Patil and  K. A. Patil,  Effect of Pond Ash and RBI Grade 81 on Properties of Subgrade Soil and Base Course of Flexible Pavement.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 966 - 971
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9996885.