Torres del Castillo, G. and Calvario Acócal, J. (1998) “On the dynamical symmetry of the quantum Kepler problem”, Revista Mexicana de Física, 44(4), pp. 344–352. Available at: https://rmf.smf.mx/ojs/index.php/rmf/article/view/2776 (Accessed: 30 June 2024).