%0 Journal Article %A M. V. Belubekyan %A A. H. Papyan %T Vibrations of piezoelectric layer of class 6 $mm$ with initial conditions and with rigidly clamped and free edges %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2020 %P 146-152 %V 54 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2020_54_3_a2/ %G en %F UZERU_2020_54_3_a2