@article{PismaZhETF.63.844,
    title = {Calculations of energy levels for atoms with several valence electrons},
    author = {Dzuba, V. A. and Flambaum, V. V. and Kozlov, M. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {63},
    issue = {11},
    pages = {844},
    year = {1996},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_14855.shtml},
}