Seyed Abolhasan Naeini and  Saeideh Mohammadi,  Numerical Investigation of Embankment Settlement Improved by Method of Preloading by Vertical Drains.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2018, vol. 144(12). 756 - 759
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/10009901.