@article{PismaZhETF.58.389,
    title = {Concentration dependence of the transition temperature and isotope-effect exponent in high-$T_c$ superconductors},
    author = {Pashitski, E. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {58},
    issue = {5},
    pages = {389},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17940.shtml},
}