@article{PismaZhETF.30.379,
    title = {A new approach to determination of the energy levels of the bound states in quantum mechanics. Convergent perturbation theory},
    author = {Turbiner, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {30},
    issue = {6},
    pages = {379},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20648.shtml},
}