Published Online: Dec 24, 2018
Page range: 107 - 111
DOI: https://doi.org/10.2478/auseur-2018-0007
© 2018 Tibor Toró, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Tibor Toró
Sapientia Hungarian University of Transylvania,,
Faculty of Sciences and ArtsCluj-Napoca