Authors
Signe Allena-Ozolina
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dzintars Jaunzems
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Ieva Pakere
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Andra Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Gatis Bazbauers
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia