Authors
Girts Bohvalovs
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia
Vladimirs Kirsanovs
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia
Andra Blumberga
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Faculty of Electrical and Environmental Engineering, Riga Technical University, Riga, Latvia