@article{PismaZhETF.25.563,
    title = {New type of optical parametric generator and amplifier},
    author = {Lugovoi, V. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {25},
    issue = {12},
    pages = {563},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21487.shtml},
}