Authors
K. Frisfelds
Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, Riga, Latvia
O. Krievs
Institute of Industrial Electronics and Electrical Engineering, Riga Technical University, Riga, Latvia
© 2019 K. Frisfelds, O. Krievs, published by Institute of Physical Energetics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.