@article{PismaZhETF.47.227,
    title = {Nature of wave collapse in the critical case},
    author = {Zakharov, V. E. and Shvets, V. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {47},
    issue = {4},
    pages = {227},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16502.shtml},
}