%0 Journal Article %A G. K. Abgaryan %T Frequency tunable $THz$-generation in periodically poled lithium niobate crystal %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2014 %P 46-49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2014_2_a5/ %G en %F UZERU_2014_2_a5