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Publicado en línea: 02 dic 2020
Páginas: 395 - 404
Recibido: 27 oct 2020
DOI: https://doi.org/10.2478/ausm-2020-0028
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© 2020 Csaba Szántó et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Szántó, Csaba
Babeş-Bolyai University, Faculty of Mathematics and Computer ScienceCluj-Napoca, Romania
Szöllősi, István
Babeş-Bolyai University, Faculty of Mathematics and Computer ScienceCluj-Napoca, Romania