@article{PismaZhETF.22.181,
    title = {Character of the phase transition in $\pi$ condensation},
    author = {Dyugaev, A. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {22},
    issue = {3},
    pages = {181},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23291.shtml},
}