- B. Cano, “Conserved quantities of some Hamiltonian wave equations after full discretization”, Numer. Math., 103, № 2, 2006, 197

- Hubert Kalf, Osanobu Yamada, “Essential self-adjointness of n-dimensional Dirac operators with a variable mass term”, Journal of Mathematical Physics, 42, № 6, 2001, 2667

- K.M. Schmidt, “Exceptional coupling constants for the Coulomb–Dirac operator with anomalous magnetic moment”, Journal of Computational and Applied Mathematics, 194, № 1, 2006, 17

- Takashi Ichinose, “Path integral for the radial Dirac equation”, Journal of Mathematical Physics, 46, № 2, 2005, 022103

- Hubert Kalf, Karl Michael Schmidt, “Spectral stability of the Coulomb–Dirac Hamiltonian with anomalous magnetic moment”, Journal of Differential Equations, 205, № 2, 2004, 408

- Hubert Kalf, Osanobu Yamada, “Essential self-adjointness of Dirac operators with a variable mass term”, Proc. Japan Acad. Ser. A Math. Sci., 76, № 2, 2000

- E. B. Kapengut, M. K.-H. Kiessling, E. Ling, A. S. Tahvildar-Zadeh, “On the Discrete Dirac Spectrum of General-Relativistic Hydrogenic Ions with Anomalous Magnetic Moment”, Ann. Henri Poincaré, 2025
