Dr. Levon R. Mailyan is a Professor at Don State Technical University, Rostov-on-Don, Russia; Dr. Sergey A. Stelmakh is an Associate Professor at Don State Technical University, Rostov-on-Don, Russia; Dr. Evgenii M. Shcherban is an Associate Professor at Don State Technical University, Rostov-on-Don, Russia; Dr. Mikhail G. Kholodnyak is an Associate Professor at Don State Technical University, Rostov-on-Don, Russia; Dr. Alla S. Smolyanichenko is an Associate Professor at Don State Technical University, Rostov-on-Don, Russia; Dr. Ivan A. Parinov is Chief Research Fellow, I. I. Vorovich Mathematics, Mechanics and Computer Sciences Institute of the Southern Federal University; and Dr. Alexander V. Cherpakov is Senior. Researcher, Vorovich Mathematics, Mechanics and Computer Sciences Institute of the Southern Federal University, Rostov-on-Don, Russia.