Fractional Helmholtz and Fractional Wave Equations with Riesz-Feller and Generalized Riemann-Liouville Fractional Derivatives. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 7, n. 3, p. 312–334, 2014. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/2176.. Acesso em: 30 apr. 2024.