@article{PismaZhETF.29.457,
    title = {Orientational second-order phase transitions in monolayers},
    author = {Burkov, S. E.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {8},
    pages = {457},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22120.shtml},
}