1. Department of Mathematics, Huzhou University, Huzhou 313000, P. R. China
2. Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China
3. Department of Mathematics, Riphah International University, I-14, Islamabad 44000, Pakistan
4. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan
5. Department of Mathematics and Computer Science, Beirut Arab University, Beirut, Lebanon
6. Department of Physics, IHSE, Siksha “O” Anusandhan Deemed to be University, Bhubaneswar 751003, India