@article{PismaZhETF.10.453,
    title = {Second Critical Current of Bulky Superconductors},
    author = {Andreev, A. F.},
    journal = {Письма в ЖЭТФ},
    volume = {10},
    issue = {9},
    pages = {453},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26783.shtml},
}