@article{PismaZhETF.52.969,
    title = {NQR study of hysteresis in $YBa_2Cu_3O_{7-x}$},
    author = {Bondar', A. V. and Ryabchenko, S. M. and Fedotov, Yu. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {52},
    issue = {6},
    pages = {969},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17511.shtml},
}