@article{PismaZhETF.17.69,
    title = {Lasing on  $Cr^3$ Ions  in  Yttrium Aluminum  Garnet  Crystals},
    author = {Sevast'yanov, B. K. and Bagdasarov, Kh. S. and Pasternak, L. B. and Volkov, S. Yu. and Orekhova, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {17},
    issue = {2},
    pages = {69},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23433.shtml},
}