@article{PismaZhETF.28.468,
    title = {Wavefront inversion in superradiance},
    author = {Koptev, V. G. and Lazaruk, A. M. and Petrovich, I. P. and Rubanov, A. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {28},
    issue = {7},
    pages = {468},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24191.shtml},
}