Shyjo Johnson, T. Jeyapoovan, D.Nagarajan. “A Corner Sampling Point Quadrature Method for 3 Node Triangular Element for the Evaluation of Element Stiffness Matrix in Finite Element Analysis”. International Journal of Advanced Science and Technology, Vol. 29, no. 04, June 2020, pp. 6456 -8, http://sersc.org/journals/index.php/IJAST/article/view/27337.