@article{PismaZhETF.48.326,
    title = {Acoustic characteristics and structural features of the vibration spectrum of the $La_{2-x}Sr_xCuO_4$ (x=0 and 0.2) lattice and the $YBa_2Cu_3O_y$ (y=6 and 7) lattice},
    author = {Makarov, V. I. and Zavaritskii, N. V. and Klochko, V. S. and Voronov, A. P. and Tkachenko, V. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {48},
    issue = {6},
    pages = {326},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16727.shtml},
}