@article{PismaZhETF.41.439,
    title = {Diverging perturbation-theory series and classical mechanics},
    author = {Popov, V. S. and Vainberg, V. M. and Mur, V. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {41},
    issue = {10},
    pages = {439},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22394.shtml},
}