@article{PismaZhETF.35.418,
    title = {Free-electron masers with Bragg resonators},
    author = {Botvinnik, I. E. and Bratman, V. L. and Volkov, A. B. and Ginzburg, N. S. and Denisov, G. G. and Kol'chugin, B. D. and Ofitserov, M. N. and Petelin, M. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {10},
    pages = {418},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20038.shtml},
}