@article{PismaZhETF.18.156,
    title = {Thin-film layers with distributed amplitude modulated feedback},
    author = {Zlenko, A. A. and Prokhorov, A. M. and Sychugov, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {3},
    pages = {156},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_27626.shtml},
}