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   2.  Hisham T. Eid, “Bearing capacity and settlement of skirted shallow foundations on sand,” ASCE, pp. 645- 652, 2013.
   3. M. A. Islam and C. T. Gnanendran “Behaviour of a Strip Footing Near Slope Crest Under Vertical Cyclic Loading,” ASCE, pp . 31-40, 2015.
   4. Mariamma Joseph and A.S Anju, “Behaviour of skirted footing resting on sea sand,” International Journal of scientific Research and Engineering Trends, pp. 471-475, 2018.
   5. M.E.I Saawf and A. Nazer, “Behavior of circular footing resting on confined granular soil,” ASCE, pp. 359-366, 2005.
   6. Mohammed Y. Fattah, Kais T. Shlash, Husham A. Mohammed, “Bearing Capacity of Rectangular Footing on Sandy Soil Bounded by a Wall,” Springer, pp. 7621–7633, August 2014.
   7. Renaningsih, Isvan Fajar Satria, Agus Susanto and Anto Budi Listyawan, “Method to Increase Ultimate Bearing Capacity of Skirted Circular Footing,” AIP Conf, pp. 1-8, 2017.