@article{PismaZhETF.61.142,
    title = {On deformations of some integrable equations},
    author = {Ivanova, τ. A. and Popov, A. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {61},
    issue = {2},
    pages = {142},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_13240.shtml},
}