@article{PismaZhETF.9.360,
    title = {Superconductivity in Systems with Arbitrary Interaction Siqn},
    author = {Kirzhnits, D. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {6},
    pages = {360},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25363.shtml},
}