@article{PismaZhETF.18.260,
    title = {Experimental study of gasdynamic amplification of $N_20-N_2-He$ laser emission},
    author = {Grin', Yu. I. and Polyakov, V. M. and Testov, V. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {18},
    issue = {4},
    pages = {260},
    year = {1973},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23918.shtml},
}