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@article{DAN_1957_114_1_a14, author = {G. A. Zaitsev}, title = {Shift of energy levels of a particle with spin $1/2$ in a {Coulomb} field}, journal = {Doklady Akademii Nauk}, pages = {61--63}, publisher = {mathdoc}, volume = {114}, number = {1}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a14/} }
G. A. Zaitsev. Shift of energy levels of a particle with spin $1/2$ in a Coulomb field. Doklady Akademii Nauk, Tome 114 (1957) no. 1, pp. 61-63. http://geodesic.mathdoc.fr/item/DAN_1957_114_1_a14/