@article{PismaZhETF.29.570,
    title = {Investigation of the shape of nonlinear resonances at low pressures},
    author = {Bagaev, S. N. and Dychkov, A. S. and Chebotaev, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {29},
    issue = {9},
    pages = {570},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22150.shtml},
}