Published Online: Jul 16, 2020
Page range: 207 - 209
Received: Oct 15, 2019
Accepted: Nov 03, 2019
DOI: https://doi.org/10.2478/asmj-2019-0007
© 2019 Bogdan Oprea, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Bogdan Oprea
Lucian Blaga University,
Sibiu, Romania