1. Department of Mathematics, Government College University Faisalabad, Faisalabad 38000, Pakistan
2. School of Computer Science and Technology, Tiangong University, Tianjin, P. R. China
3. Department of Mechanical and Aerospace Engineering, Air University, Islamabad, Pakistan
4. Faculty of Science, Yibin University, Yibin 644000, P. R. China
5. Department of Mathematics, Faculty of Science, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia
6. Mathematics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
7. School of Mathematics and Information Science, Henan Polytechnic University, Jiaozuo, P. R. China
8. National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Ren-Ai Road, Suzhou, P. R. China