@article{PismaZhETF.47.595,
    title = {The critical state and the $H_{c1}$ field in $YBa_2Cu_3O_{7-x}$, single crystals},
    author = {Kartsovnik, M. V. and Larkin, V. A. and Ryazanov, V. V. and Sidorov, N. S. and Shchegolev, I. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {47},
    issue = {11},
    pages = {595},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16601.shtml},
}