BAYRAK, M. A.; TETIK, S. Approximate Solution of Time-Fractional Helmholtz and Coupled Helmholtz Equations. Communications in Mathematics and Applications, [S. l.], v. 11, n. 4, p. 575–586, 2020. DOI: 10.26713/cma.v11i4.1370. Disponível em: https://www.journals.rgnpublications.com/index.php/cma/article/view/1370. Acesso em: 18 aug. 2025.