@article{PismaZhETF.19.268,
    title = {Phase transitions in a two-dimensional ferromagnet with "easy-plane" anisotropy},
    author = {Karimov, Yu. S. and Novikov, Yu. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {19},
    issue = {5},
    pages = {268},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26985.shtml},
}