@article{PismaZhETF.18.353,
    title = {Particle-number spectrum of extensive air showers at sea level},
    author = {Khristiansen, G. B. and Kulikov, G. V. and Solov'eva, V. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {6},
    pages = {353},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23945.shtml},
}