@article{PismaZhETF.4.19,
    title = {Propagation of a Light Pulse in a Nonlinearly Amplifying and Absorbing Medium},
    author = {Ambartsumyan, R. V. and Basov, N. G. and Zuev, V. S. and Kryukov, P. G. and Letokhov, V. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {4},
    issue = {1},
    pages = {19},
    year = {1966},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24816.shtml},
}