Ali A. Al-Jazaairry and  Tahsin T. Sabbagh,  Effect of Cavities on the Behaviour of Strip Footing Subjected to Inclined Load .   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 123(3). 292 - 298
    [viewed 21 April 2021]. Available from: https://publications.waset.org/pdf/10006542.