Authors
Zanda U. Ozola
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Rudite Vesere
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Silvija N. Kalnins
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia