1. Faculty of Mathematics and Computational Science; Xiangtan University; Hunan 411105 P.R. China
2. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Faculty of Science; King Abdulaziz University; Jeddah 21589 Saudi Arabia
3. Department of Humanities and Sciences; National Institute of Technology; Farmagudi Goa 403 401 India
4. Department of Mathematics; Guelma University; Guelma 24000 Algeria