@article{PismaZhETF.41.66,
    title = {Four-photon parametric luminescence during noncollinear two-frequency excitation},
    author = {Vaichaitis, V. I. and Ignatavichyus, M. V. and Kudryashov, V. A. and Pimenov, Yu. N. and Ustinov, N. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {41},
    issue = {2},
    pages = {66},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21921.shtml},
}