@article{PismaZhETF.60.691,
    title = {Study of the surface of a LiF:$F^-_2$ crystal at a subwave spatial resolution},
    author = {Konopskii, V. N. and Sekatskii, S. K. and Letokhov, V. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {60},
    issue = {10},
    pages = {691},
    year = {1994},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20424.shtml},
}