Authors
Weiwei Sun
School of Mathematics, China University of Mining and Technology 1, China
School of Mathematics and Statistics, Fuyang Normal University, China
Pengjie Liu
College of Mathematics and Information Science, Guangxi University, China
© 2021 Weiwei Sun, Liang Shen, Hu Shao, Pengjie Liu, published by University of Zielona Góra
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.