Authors
J. Kalnacs
Institute of Physical Energetics, Riga, Latvia
R. Bendere
Institute of Physical Energetics, Riga, Latvia
A. Murasovs
Institute of Physical Energetics, Riga, Latvia
D. Arina
Institute of Physical Energetics, Riga, Latvia
A. Antipovs
Institute of Physical Energetics, Riga, Latvia
A. Kalnacs
Institute of Physical Energetics, Riga, Latvia
L. Sprince
Institute of Physical Energetics, Riga, Latvia