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Publicado en línea: 10 sept 2018
Páginas: 90 - 100
Recibido: 08 may 2017
DOI: https://doi.org/10.2478/ausm-2018-0008
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© 2018 Rabah Khaldi et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Khaldi, Rabah
Laboratory of Advanced Materials, Department of Mathematics, Badji Mokhtar-Annaba UniversityAlgeria
Guezane-Lakoud, Assia
Laboratory of Advanced Materials, Department of Mathematics, Badji Mokhtar-Annaba UniversityAlgeria