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Publicado en línea: 29 may 2020
Páginas: 34 - 41
Recibido: 31 dic 2019
Aceptado: 28 feb 2020
DOI: https://doi.org/10.2478/mjpaa-2020-0003
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© 2020 F. Jafari et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Jafari, F.
Department of Mathematics, Faculty of Sciences, Shiraz Branch, Islamic Azad UniversityShiraz
Kamali, Z.
Department of Mathematics, Faculty of Sciences, Shiraz Branch, Islamic Azad UniversityShiraz