Phongthanapanich, S. “An Explicit Finite Volume Element Method Without an Explicit Artificial Diffusion Term for Convection-Diffusion Equation on Triangular Grids”. Science & Technology Asia, Vol. 15, no. 3, 1, pp. 69-80, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41286.