Saeed Talamkhani and  Seyed Abolhassan Naeini,  Effect of Plastic Fines on Undrained Behavior of Clayey Sands.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 140(8). 525 - 528
    [viewed 10 December 2019]. Available from: https://publications.waset.org/pdf/10009302.