@article{PismaZhETF.9.261,
    title = {Investigation of the Domain Structure of a KDP Crystal by Optical Methods},
    author = {Velichkina, T. S. and Golubeva, O. N. and Shustin, O. A. and Yakovlev, I. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {9},
    issue = {5},
    pages = {261},
    year = {1969},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25323.shtml},
}