@article{PismaZhETF.62.447,
    title = {Dynamic criterion for collapse},
    author = {Lushnikov, P. M.},
    journal = {Письма в ЖЭТФ},
    volume = {62},
    issue = {5},
    pages = {447},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18398.shtml},
}