@article{PismaZhETF.7.237,
    title = {Nonstationary Nonlinear Optical Effects and Formation of Ultrashort Light Pulses},
    author = {Akhmanov, S. A. and Kovrigin, A. I. and Sukhorukov, A. P. and Khokhlov, R. V. and Chirkin, A. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {7},
    issue = {7},
    pages = {237},
    year = {1968},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25629.shtml},
}