À propos de cet article
Publié en ligne: 25 mars 2015
Pages: 171 - 182
Reçu: 03 oct. 2014
Accepté: 29 déc. 2014
DOI: https://doi.org/10.2478/awutm-2014-0018
Mots clés
© Annals of West University of Timisoara - Mathematics
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Rezaei, Akbar
Saeid, Arsham Borumand