@article{PismaZhETF.56.419,
    title = {Isotope effect as an experimentum crucis for identifying the mechanism for high-$T_c$ superconductivity},
    author = {Pashitskii, E. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {56},
    issue = {8},
    pages = {419},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19511.shtml},
}