AGUIRRE, M. A. .; AGUIRRE, E. A. . Elemental solution of the ultrahyperbolic equation iterated m times. Nexo Scientific Journal, [S. l.], v. 35, n. 04, p. 867–880, 2022. DOI: 10.5377/nexo.v35i04.15523. Disponível em: https://camjol.info/index.php/NEXO/article/view/15523. Acesso em: 18 jul. 2024.