Levonyan, L. and Manukyan, H. (2017) “FEATURES OF DIFFRACTION FOCUSING OF A SPHERICAL X-RAY WAVE ON A SHORT PERIOD SUPERLATTICE”, Proceedings of the YSU A: Physical and Mathematical Sciences. Yerevan, Armenia, 51(1 (242), pp. 113–116. doi: 10.46991/PYSU:A/2017.51.1.113.