À propos de cet article
Publié en ligne: 23 mars 2018
Pages: 199 - 206
Reçu: 17 janv. 2017
DOI: https://doi.org/10.1515/tmmp-2017-0027
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© 2018
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Boyadzhiev, Khristo N.
Ohio Northern University, Department of Mathematics and Statistics, Ada,Ohio, USA