@article{PismaZhETF.35.68,
    title = {Theory of second-harmonic generation upon reflection of light from a medium with a center of inversion},
    author = {Agranovich, V. M. and Darmanyan, S. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {35},
    issue = {2},
    pages = {68},
    year = {1982},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_19824.shtml},
}