@article{PismaZhETF.45.327,
    title = {Observation of a Cerenkov-type radiation during the propagation of picosecond light pulses in sodium vapor},
    author = {Vaichaffis, V. I. and Ignatavichyus, M. V. and Kudryashov, V. A. and Pimenov, Yu. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {45},
    issue = {7},
    pages = {327},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18766.shtml},
}