К.К. Аltunin - Ph. D. (Phys.-Math.), Associate Professor, Ulyanovsk State Pedagogical University. Е-mail: teleportation@yandex.ru
К.К. Аltunin - Ph.D. (Phys.-Math.), Associate Professor, Ulyanovsk State Pedagogical University n.a. I.N. Ulyanov. E-mail: teleportation@yandex
К.К. Аltunin - Ph.D. (Phys.-Math.), Associate Professor, Ulyanovsk State Pedagogical University named after I.N. Ulyanov
E-mail: teleportation @ yandex