| Affiliation: | 1. School of Mathematics and Statistics, Shandong Normal University, Jinan, Shandong, 250358, China;2. School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, China;3. School of Mathematical Sciences, Nankai University, Tianjin, 300071, China;1. Ivan Franko National University of Lviv, Ukraine;2. Jan Kochanowski University in Kielce, Poland;1. Department of Civil Environmental Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, I 43124 Parma, Italy;2. Department of Civil and Mechanical Engineering, University of Cassino and SL, Via G. Di Biasio 43, I 03043 Cassino, Italy |
