Authors
F. Jafari
Department of Mathematics, Faculty of Sciences, Shiraz Branch, Islamic Azad University, Shiraz
Z. Kamali
Department of Mathematics, Faculty of Sciences, Shiraz Branch, Islamic Azad University, Shiraz
© 2020 F. Jafari, Z. Kamali, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.