S. Balkissoon, S. R. Gunakala, D. Comissiong, and V. Job, “The comparative analysis of the two dimensional Laplace equation using the Galerkin finite element method with the exact solution for various domains (circular and rectangular) with triangular elemental meshing”, IJAMR, vol. 4, no. 1, pp. 193–204, Feb. 2015, doi: 10.14419/ijamr.v4i1.4042.