Kirakosyan, A., Avetyan, K., & Gasparyan, I. (2017). PETROS H. BEZIRGANYAN THE GREAT SCIENTIST AND THE PATRIOT: (on the occasion $ 100^{th} $ anniversary). Proceedings of the YSU A: Physical and Mathematical Sciences, 51(1 (242), 78–80. https://doi.org/10.46991/PYSU:A/2017.51.1.078