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Publicado en línea: 16 may 2019
Páginas: 77 - 84
Recibido: 14 feb 2019
Aceptado: 03 abr 2019
DOI: https://doi.org/10.1515/mjpaa-2018-0008
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© 2018 Elhoussine Azroul et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Azroul, Elhoussine
Department of Mathematics, Faculty of SciencesFez, Morocco
Balaadich, Farah
Department of Mathematics, Faculty of SciencesFez, Morocco