Authors
Khalima Turgumbayeva
Satbayev University, Almaty, Kazakhstan
Dagnija Blumberga
Institute of Energy Systems and Environment, Riga Technical University, Latvia
© 2021 Aray Abildayeva, Khalima Turgumbayeva, Dagnija Blumberga, published by Riga Technical University
This work is licensed under the Creative Commons Attribution 4.0 License.