On the Bessel Operator $\odot_{B}^{t}$ Related to the Bessel-Helmholtz and Bessel Klein-Gordon Operator. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 4, p. 922–928, 2018. DOI: 10.29020/nybg.ejpam.v11i4.3319. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3319.. Acesso em: 27 apr. 2024.