@article{DAN_1994_334_1_a11,
     author = {B. A. Nadykto},
     title = {On isotope mass shifts of energy levels of helium-like and lithium-like ions},
     journal = {Doklady Akademii Nauk},
     pages = {41--43},
     year = {1994},
     volume = {334},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_334_1_a11/}
}