Affiliation: | 1. Department of Applied Mathematics, Nanjing Forestry University, Nanjing 210037, PR China;2. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;3. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan;4. School of Mathematics, Shanghai University of Finance and Economics, Shanghai 200433, PR China |