@article{PismaZhETF.4.90,
    title = {On the Use of an Electron Synchrotron as a Maser},
    author = {Sokolov, A. A. and Ternov, I. M.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {3},
    pages = {90},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24839.shtml},
}