Authors
Signe Gerinovica
Riga Technical University, Faculty of Electrical and Environmental Engineering, Institute of Energy Systems and Environment, Riga, Latvia
Dagnija Blumberga
Riga Technical University, Faculty of Electrical and Environmental Engineering, Institute of Energy Systems and Environment, Riga, Latvia
Antra Kalnbalkite
Riga Technical University, Faculty of Electrical and Environmental Engineering, Institute of Energy Systems and Environment, Riga, Latvia
Anita Vecina
Riga Technical University, Faculty of Electrical and Environmental Engineering, Institute of Energy Systems and Environment, Riga, Latvia