@article{PismaZhETF.31.693,
    title = {Interpretation of the quasi-periodic intensity variations of the hard atmospheric $\gamma$ radiation},
    author = {Gal'per, A. M. and Kirillov-Ugryumov, V. G. and Leikov, N. G. and Luchkov, B. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {31},
    issue = {11},
    pages = {693},
    year = {1980},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20511.shtml},
}