Authors
Morteza Norouzi
Department of Mathematics, Faculty of Basic Sciences, University of Bojnord,, Bojnord, Iran
Irina Cristea
Center for Systems and Information Technologies, University of Nova Gorica,, Nova Gorica, Slovenia
© 2017 Morteza Norouzi, Irina Cristea, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.