Authors
Liva Snitko
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Liga Rozentale
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Andra Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia