À propos de cet article
Publié en ligne: 31 déc. 2020
Pages: 116 - 125
Reçu: 25 sept. 2020
Accepté: 04 nov. 2020
DOI: https://doi.org/10.2478/cait-2020-0066
Mots clés
© 2020 Nikolay Shegunov et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Shegunov, Nikolay
Kaiserslautern, Germany
Sofia UniversitySofia, Bulgaria
Iliev, Oleg
Kaiserslautern, Germany
Institute of MathematicsSofia, Bulgaria