Aguirre, Manuel A., and Emilio A. Aguirre. “THE ELEMENTARY SOLUTIONS OF LAPLACIAN OPERATOR ITERATED M TIMES (formule)”. Nexo Scientific Journal 27, no. 01 (June 30, 2014): 46–59. Accessed November 22, 2024. https://camjol.info/index.php/NEXO/article/view/1442.