@article{PismaZhETF.41.216,
    title = {Possible splitting of a phase transition in a 2D XY model},
    author = {Korshunov, S. E.},
    journal = {Письма в ЖЭТФ},
    volume = {41},
    issue = {5},
    pages = {216},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21975.shtml},
}