About this article
Published Online: Mar 23, 2018
Page range: 207 - 209
Received: Feb 20, 2017
DOI: https://doi.org/10.1515/tmmp-2017-0028
Keywords
© 2018
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Sadani, Idir
Department of Mathematics, University of Mouloud Mammeri, 15000Tizi-Ouzou, ALGERIA