A. Sawangsuriya and  T. B. Edil,  Evaluation of Soil Stiffness and Strength for Quality Control of Compacted Earthwork.   journal   = {International Journal of Structural and Construction Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 110(2). 114 - 118
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10003488.