1. College of Mathematics and Systems Science, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
2. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China
3. Department of Mathematics and Statistics, FBAS, IIUI, Islamabad, Pakistan
4. Center for Modeling and Computer Simulation, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
5. Department of Mathematics and Computer Science, Transilvania University of Brasov, Brasov 500093, Romania
6. Department of Mathematics, University of Lahore, Sargodha Campus, Sargodha, Pakistan