@article{PismaZhETF.30.520,
    title = {On a new method of obtaining highly collimated light beams using the wavefront reversal phenomenon},
    author = {Andreev, N. F. and Bespalov, V. I. and Kiselev, A. M. and Matveev, A. Z. and Pasmanik, G. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {30},
    issue = {8},
    pages = {520},
    year = {1979},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20685.shtml},
}