@article{PismaZhETF.61.251,
    title = {Determination of the effective electron mass in an optical field from the measured emission spectrum of ultrarelativistic electrons at  a laser focus},
    author = {Goreslavskii, S. P. and Narozhnyi, N. B. and Shcherbachev, O. V.},
    journal = {Письма в ЖЭТФ},
    volume = {61},
    issue = {4},
    pages = {251},
    year = {1995},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18137.shtml},
}