Authors
Marta Delle
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Iveta Civcisa
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Valdis Vitolins
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dace Lauka
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia