@article{PismaZhETF.50.72,
    title = {Acoustic studies of $YBa_2Cu_3O_x$ single crystals},
    author = {Melik-Shakhnazarov, V. A. and Mirzoeva, I. I. and Kvirikashvili, T. Sh. and Dzharparidze, S. K. and Naskidashvili, I. A. and Makarenko, I. N. and Stishov, S. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {2},
    pages = {72},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17046.shtml},
}