%0 Journal Article %A P. A. Bezirganyan %A L. G. Gasparyan %A V. P. Mkrtchyan %T X-ray difraction in the single crystal off-surface layers %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 1989 %P 53-59 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_1989_2_a8/ %G ru %F UZERU_1989_2_a8