Authors
Zane Indzere
Institute of Energy Systems and Environment, Riga Technical University, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Latvia
© 2020 Zane Indzere, Dagnija Blumberga, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.