Authors
Aliaksandr V. Chernovalov
Pope John Paul II State School of Higher Education, Biała Podlaska
Pavel A. Chernovalov
Brest State Technical University, Brest
© 2018 Aliaksandr V. Chernovalov, Marek Kuźmicki, Pavel A. Chernovalov, published by John Paul II University of Applied Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.