Authors
K. Kroics
Institute of Physical Energetics 11 Krivu Str.,, Riga, LATVIA
Riga Technical University 1 Kalku Str.,, Riga, LATVIA
A. Suzdalenko
Riga Technical University 1 Kalku Str.,, Riga, LATVIA
O. Husev
Riga Technical University 1 Kalku Str.,, Riga, LATVIA