@article{PismaZhETF.51.449,
    title = {Ring instability of wave front of light beams with regular temporal modulation},
    author = {Varnavskii, O. P. and Zhukov, N. N. and Zaskal'ko, O. P. and Kuz'min, V. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {51},
    issue = {9},
    pages = {449},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17299.shtml},
}