@article{PismaZhETF.53.242,
    title = {Anharmonicity of oxygen vibrations and formation of highly correlated state in a high-$T_c$ superconductor},
    author = {Irkhin, V. Yu. and Katsnel'son, M. I. and Trefilov, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {53},
    issue = {5},
    pages = {242},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17399.shtml},
}