**Author details**

Adrian Opre\* and Bianca Macavei Babes-Bolyai University, Cluj-Napoca, Romania

\*Address all correspondence to: adrianopre@gmail.com

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
