@article{PismaZhETF.12.174,
    title = {Measurement of the Level Relaxation Constants by the Method of Three-level Laser Spectroscopy},
    author = {Beterov, I. M. and Matyugin, Yu. A. and Chebotaev, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {12},
    issue = {4},
    pages = {174},
    year = {1970},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_26267.shtml},
}