@article{PismaZhETF.13.724,
    title = {Accumulating Nonlinear Optical Effects in a Pump Field with a  Broad Frequency Spectrum},
    author = {Akhmanov, S. A. and D'yakov, Yu. E. and Chirkin, A. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {13},
    issue = {12},
    pages = {724},
    year = {1971},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24386.shtml},
}