@article{PismaZhETF.50.411,
    title = {Analysis of readings of underground acoustic installation on 23 February 1987},
    author = {Vavilov, Yu. N. and Verbitskii, T. Z. and Khavroshkin, O. B.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {10},
    pages = {411},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17144.shtml},
}