%0 Journal Article %A A. V. Galstyan %T Polymer dispersed liquid crystal gratings' evolution and investigation of their diffraction efficiency %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2004 %P 47-52 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2004_2_a6/ %G ru %F UZERU_2004_2_a6