2018. On the Bessel Operator $\odot_{B}^{t}$ Related to the Bessel-Helmholtz and Bessel Klein-Gordon Operator. European Journal of Pure and Applied Mathematics. 11, 4 (Oct. 2018), 922–928. DOI:https://doi.org/10.29020/nybg.ejpam.v11i4.3319.