V.V. Chekanov, N.V. Kandaurova, V.S. Chekanov, J.A. Rakhmanina
E.N. Diskaeva - Ph.D. (Phys.-Math.), Associate Professor, Department of Humanities, Natural Sciences and Legal Disciplines, Private educational organization of higher education «Stavropol University». E-mail: diskaevapes@mail.ru
Yu.A. Boyko - Ph.D. (Phys.-Math.), Department of Research and International Cooperation,
Private educational organization of higher education «Stavropol University». E-mail: boykoya@bk.ru
E.N. Diskaeva - Ph.D. (Phys.-Math.), Associate Professor, Department of Humanities, Natural Sciences and Legal Disciplines, University of Stavropol (Stavropol). E-mail: diskaevapes@mail.ru
Yu. A. Boyko - Ph.D. (Phys.-Math.), Specialist of Scientific Information and Analytical Work,
Department of Research and International Cooperation, University of Stavropol (Stavropol). E-mail: boykoya@bk.ru