@article{PismaZhETF.21.666,
    title = {Extensive air showers of cosmic rays and scale invariance in hadronic interactions at ultrahigh energies},
    author = {Kalmykov, N. N. and Khristiansen, G. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {21},
    issue = {11},
    pages = {666},
    year = {1975},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22518.shtml},
}