@article{PismaZhETF.55.380,
    title = {Light diffraction by multifrequency thick gratings},
    author = {Galkin, O. N. and Kravchenko, V. I. and Parkhomenko, Yu. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {55},
    issue = {7},
    pages = {380},
    year = {1992},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19267.shtml},
}