Authors
Rabah Khaldi
Laboratory of Advanced Materials, Department of Mathematics, Badji Mokhtar-Annaba University, Algeria
Assia Guezane-Lakoud
Laboratory of Advanced Materials, Department of Mathematics, Badji Mokhtar-Annaba University, Algeria
© 2018 Rabah Khaldi, Assia Guezane-Lakoud, published by Sapientia Hungarian University of Transylvania
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.