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Publicado en línea: 24 ene 2020
Páginas: 140 - 163
Recibido: 25 jul 2019
Aceptado: 18 oct 2019
DOI: https://doi.org/10.2478/mjpaa-2019-0011
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© 2019 Naimat Ullah et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Ullah, Naimat
Department of Mathematics, COMSATS UniversityIslamabad, Pakistan
Shagari, Mohammed Shehu
Department of Mathematics, Faculty of Physical Sciences, Ahmadu Bello UniversityNigeria
Azam, Akbar
Department of Mathematics, COMSATS UniversityIslamabad, Pakistan