Authors
Artion Kashuri
Department of Mathematics, Faculty of Technical Science, University "Ismail Qemali",, Vlora, Albania
Rozana Liko
Department of Mathematics, Faculty of Technical Science, University "Ismail Qemali",, Vlora, Albania
© 2017 Artion Kashuri, Rozana Liko, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.