@article{PismaZhETF.27.293,
    title = {Lasing at $\lambda$ = 97.2 nm in hydrogen},
    author = {Troshin, B. I. and Chebotaev, V. P. and Chernenko, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {27},
    issue = {5},
    pages = {293},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23698.shtml},
}