@article{PismaZhETF.20.641,
    title = {Effect of nonlinear multipassage "nondamping" of sound},
    author = {Ilisavskii, Yu. V. and Yakhkind, E. Z.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {20},
    issue = {10},
    pages = {641},
    year = {1974},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27366.shtml},
}