@article{PismaZhETF.28.202,
    title = {Second harmonic generation in liquid crystals; symmetry of molecules and macroscopic nonlinearity},
    author = {Arakelyan, S. M. and Grigoryan, G. L. and Nersisyan, S. Ts. and Nshanyan, M. A. and Chilingaryan, Yu. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {28},
    issue = {4},
    pages = {202},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_24121.shtml},
}