@article{PismaZhETF.57.458,
    title = {Two-dimensional Bose gas at low density},
    author = {Ovchinnikov, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {57},
    issue = {8},
    pages = {458},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_4874.shtml},
}