@article{PismaZhETF.9.338,
    title = {Dependence of the Energy of  an Electron-proton Cascade, Produced by Collision of a Nuclear-active Cosmic-ray Particle with a Lead Nucleus, on the Energy of the Interacting Particle},
    author = {Nam, R. A. and Nikol'skii, S. I. and Pavlichenko, V. P. and Sokolovskii, V. I. and Yakovlev, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {6},
    pages = {338},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25357.shtml},
}