@article{PismaZhETF.10.263,
    title = {Second Harmonic Generation in the Crystal χΕSο$_4ξ_2$ο},
    author = {Dobrzhanskii, G. F. and Golovei, M. P. and Kosodrov, G. I.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {10},
    issue = {6},
    pages = {263},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25947.shtml},
}