Authors
A. Santosa
Institute of Solid State Physics, University of Latvia 8 Kengaraga Str, Riga, Latvia
S. Fomins
Institute of Solid State Physics, University of Latvia 8 Kengaraga Str, Riga, Latvia
V. Karitāns
Institute of Solid State Physics, University of Latvia 8 Kengaraga Str, Riga, Latvia