@article{PismaZhETF.43.51,
    title = {Phases of a 2D planar antiferromagnet in a uniform field},
    author = {Lee, D. H. and Joannopoulos, J. D. and Negele, J. W. and Landau, D. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {43},
    issue = {1},
    pages = {51},
    year = {1986},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21234.shtml},
}