@article{PismaZhETF.46.457,
    title = {Structure of tetragonal superconducting $YBa_2Cu_{2.862}O_{6.62}$ single crystals with Tc $\approx 50$ K},
    author = {Topnikov, V. N. and Simonov, V. I. and Muradyan, L. A. and Molchanov, V. N. and Zvarykina, A. V. and Laukhin, V. N. and Rozenberg, L. P. and Shibaeva, R. P. and Yagubskii, E. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {46},
    issue = {11},
    pages = {457},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18646.shtml},
}