Rostomyan, A. M. “INVESTIGATION OF X-RAY SYMMETRIC BBB-INTERFEROMETERS”. Proceedings of the YSU A: Physical and Mathematical Sciences 39, no. 1 (206) (February 28, 2005): 48–52. Accessed November 23, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol39_no1_2005_pp048-052.