Authors
Liga Rozentale
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Riga, Latvia
© 2019 Liga Rozentale, Dagnija Blumberga, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.