@article{PismaZhETF.15.456,
    title = {Parametric Ultrasound Generator},
    author = {Ostrovskii, L. A. and Papilova, T. A. and Sutin, A. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {15},
    issue = {8},
    pages = {456},
    year = {1972},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26622.shtml},
}