V. L. Barantsevich
Department of the All-Union Scientific-Research Institute of Electromechanics, USSR
L.V. Barkova
Department of the All-Union Scientific-Research Institute of Electromechanics, USSR
M. D. Parfentiev
Department of the All-Union Scientific-Research Institute of Electromechanics, USSR
I. A. Tribunskaya
Department of the All-Union Scientific-Research Institute of Electromechanics, USSR