@article{PismaZhETF.51.252,
    title = {Solutions of nonlinear-optics equations found outside the approximation of slowly varying amplitudes and phases},
    author = {Belenov, E. M. and Nazarkin, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {51},
    issue = {5},
    pages = {252},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17243.shtml},
}