American Physical Society
A scattered-wave formalism based on the one-electron Dirac equation for a muffin-tin potential is presented. It is shown that the resulting relativistic secular equations reduce to their nonrelativistic counterparts in the infinite-rest-energy limit.
C.Y. Yang and S. Rabii, “Relativistic Scattered-Wave Theory,” Physical Review A12, 362-369 (1975). https://doi.org/10.1103/PhysRevA.12.362