@article{PismaZhETF.28.153,
    title = {Generation of the optical second harmonic in noncommensurate phases of crystals},
    author = {Aleksandrov, K. S. and Vtyurin, A. N. and Shabanov, V. F.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {28},
    issue = {3},
    pages = {153},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24110.shtml},
}