@article{PismaZhETF.47.207,
    title = {Properties of superfluid systems with multiple zeros in the spectrum of fermions},
    author = {Volovik, G. E. and Konyshev, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {47},
    issue = {4},
    pages = {207},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16521.shtml},
}