@article{PismaZhETF.45.413,
    title = {Properties of superconductors with a strong electron-phonon interaction},
    author = {Bulaevskii, L. N. and Dolgov, O. V.},
    journal = {Письма в ЖЭТФ},
    volume = {45},
    issue = {9},
    pages = {413},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18808.shtml},
}