R. Ziaie Moayed and  A. Mahigir,  Circular Raft Footings Strengthened by Stone Columns under Dynamic Harmonic Loads.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2018, vol. 133(1). 24 - 29
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10008398.