@article{PismaZhETF.18.211,
    title = {Use of the Vavilov-Cerenkov effect to separate a difference frequency},
    author = {Kornienko, L. S. and Kravtsov, N. V. and Shevchenko, A. K.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {3},
    pages = {211},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27817.shtml},
}