%0 Journal Article %A V. S. Harutyunyan %T Diffraction of spherical X-ray waves in bicrystal interferometer. I. Rotational moire %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 1985 %P 74-79 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_1985_2_a12/ %G ru %F UZERU_1985_2_a12