@article{PismaZhETF.51.593,
    title = {Determination of properties of electric-field-gradient tensor at $YBa_2Cu_3O_{7-x}$ lattice sites by emission Mossbauer spectroscopy},
    author = {Seregin, P. P. and Nasredinov, F. S. and Masterov, V. F. and Daribaeva, G. T.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {51},
    issue = {11},
    pages = {593},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17691.shtml},
}