@article{PismaZhETF.9.564,
    title = {Four-photon Resonant Parametric Interaction in Lasers Using Dye Solutions.},
    author = {Derkachva, L. D. and Krymova, A. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {10},
    pages = {564},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25399.shtml},
}