@article{PismaZhETF.36.216,
    title = {Possibility of studying cosmic rays with energies > $10^{20}$ eV},
    author = {Gusev, G. A. and Dedenko, L. G. and Zheleznykh, I. M. and Markov, M. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {36},
    issue = {6},
    pages = {216},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20161.shtml},
}