R. Ziaie Moayed and  F. Allahyari,  Determination of Required Ion Exchange Solution for Stabilizing Clayey Soils with Various PI.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2012, vol. 61(1). 32 - 36
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/4731.