1. P. A. Bezirganyan and V. I. Avundzhyan, Izv. AN Arm SSR, Fiz. 1, 147 (1966).
2. A. O. Aboyan and G. R. Drmeyan, Vestn. Inzh. Akad. Arm. 6, 269 (2009).
3. V. I. Iverenova and G. P. Revkevich, Theory of X-Ray Scattering (Mosk. Gos. Univ., Moscow, 1972) [in Russian].
4. Z. G. Pinsker, X-ray Crystal Optics (Nauka, Moscow, 1982) [in Russian].
5. H. R. Drmeyan, Crystallogr. Rep. 50, 363 (2005).