Հոդված 4995 Ashot H Gevorgyan Dmitry N. Klochkov, Koryun B. Oganesyan Nerses S. Ananikian Nikolay Sh. Izmailian Yuri V. Rostovtsev Gershon Kurizki arXiv.org arXiv:1704.06790 15 2017 https://arxiv.org/