Authors
Svetlana Raita
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Zane Kusnere
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Kriss Spalvins
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia