Authors
Alexander Genbach
Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
Nellya Jamankulova
Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
Hristo Beloev
Angel Kanchev University of Ruse, Ruse, Bulgaria
Iliya Iliev
Angel Kanchev University of Ruse, Ruse, Bulgaria