Հոդված 7660 Tariel V. Ghochikyan Melanya A. Samvelyan Armen S. Galstyan Vasiliy M. Muzalevskiy Valentin G. Nenajdenko Mendeleev Communications 27 562-564 2017 https://www.sciencedirect.com/science/article/pii/S0959943617302444