V.V. Kiryushkin − Ph.D. (Eng.), Associate Professor, Head of Department,
JSC SPE «PROTEK» (Voronezh, Russia)
E-mail: kiryushkin.vlad@mail.ru
V.G. Markin – Leading Engineer,
JSC SPE «PROTEK» (Voronezh, Russia)
E-mail: marvigs@mail.ru
A.V. Shuvaev – Leading Engineer,
JSC SPE «PROTEK»(Voronezh, Russia)
Е-mail: protek@protek-vrn.ru