@article{PismaZhETF.37.542,
    title = {Evolution of a soliton under the action of small perturbations},
    author = {Kivshar', Yu. S. and Kosevich, A. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {37},
    issue = {11},
    pages = {542},
    year = {1983},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22887.shtml},
}