@article{PismaZhETF.46.314,
    title = {Subthreshold excitation of atoms by electrons in an intense optical field},
    author = {Beigman, I. L. and Chichkov, B. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {46},
    issue = {8},
    pages = {314},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18595.shtml},
}