Institution: | 1. Institute for Physical Problems, Baku State University, Z.Khalilov 23, Baku, AZ-1148, Azerbaijan2. Institute of Physics, Azerbaijan National Academy of Sciences, H.Javid 33, Baku, AZ 1143, Azerbaijan3. Shamakhy Astrophysical Observatory, Azerbaijan National Academy of Sciences, H.Javid 115, Baku, AZ 1000, Azerbaijan |