Authors
Anrijs Tukulis
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Andra Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Uldis Bariss
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia