Authors
Oskars Svedovs
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Edgars Vīgants
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Haralds Siktars
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Vladimirs Kirsanovs
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia