@article{PismaZhETF.62.95,
    title = {Self-focusing instability of two-dimensional solitons and vortices},
    author = {Kuznetsov, E. A. and Juul Rasmussen, J.},
    journal = {Письма в ЖЭТФ},
    volume = {62},
    issue = {2},
    pages = {95},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18334.shtml},
}