@article{PismaZhETF.12.128,
    title = {Isotopic Effect of Hyperfine Broadening of X-ray Lines},
    author = {Ryl'nikov, A. S. and Ivanov, G. A. and MarushenkoV, I. and Smirnov, A. I. and Sumbaev, O. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {12},
    issue = {3},
    pages = {128},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26251.shtml},
}