About this article
Published Online: Dec 31, 2021
Page range: 135 - 146
Received: Sep 04, 2020
Accepted: Sep 27, 2021
DOI: https://doi.org/10.2478/amns.2021.1.00092
Keywords
© 2023 Meng Tian et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Tian, Meng
School of Mathematics and Statistics, Shandong University of TechnologyChina
Li, Hongkui
School of Mathematics and Statistics, Shandong University of TechnologyChina