Thanawat Chuleekiat,  Shaft Friction of Bored Pile Socketed in Weathered Limestone in Qatar.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2019, vol. 147(3). 137 - 140
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/10010131.