Hussein Yousif Aziz and  Jianlin Ma,  Gypseous Soil Improvement using Fuel Oil.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2011, vol. 51(3). 123 - 127
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/8407.