Y. V. Arkhipov, A. B. Ashikbayeva, A. Askaruly, D. Y. Dubovtsev, S. Syzganbayeva, and I. M. Tkachenko, “Optical properties of dense coulomb plasmas”, Int. j. math. phys., vol. 8, no. 1, pp. 24–27, Jun. 2017.