K. Sugantha Devi, H. T. R. K. A. S. H. “Gauss Legendre Quadrature Formulas for Polygons by Using a Second Refinement of an All Quadrilateral Finite Element Mesh of Triangular Surfaces”. International Journal of Engineering and Computer Science, vol. 5, no. 6, May 2016, http://ijecs.in/index.php/ijecs/article/view/2024.