An accurate numerical solver on second order PDEs with variable coefficients in three dimensions. - N. T. Niakas; Vassilios C. Loukopoulos; Christos Douskos (Appl. Math. Comput., 2008)

FDM on second-order partial differential equations in 3D. - N. T. Niakas; Vassilios C. Loukopoulos; Christos Douskos (Math. Comput. Model., 2010)