Emerson B.S. Corrêa, M. G. Lima, and S. C. Q. Arruda. “The Eigenfunction Method to Calculate the Klein-Gordon Propagator in an Inhomogeneous Magnetic Field”. Contemporary Mathematics 3, no. 3 (August 25, 2022): 343–352. Accessed November 26, 2024. https://ojs.wiserpub.com/index.php/CM/article/view/1556.