@article{PismaZhETF.11.540,
    title = {Second-order Phase Transitions without Divergences in the Second Derivatives of the ThermodynamiÓ Potential},
    author = {Levanyuk, A. P. and Sobyanin, A. A.},
    journal = {ðÉÓØÍÁ × öüôæ},
    volume = {11},
    issue = {11},
    pages = {540},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26189.shtml},
}