1. Department of Mathematics, College of Sciences King Saud University Riyadh Saudi Arabia
2. College of Mathematics and Systems Science Shandong University of Science and Technology Qingdao 266590 China
3. Data Recovery Key Laboratory of Sichuan Province Neijiang Normal University Dongtong Road 705 Neijiang 641100 China
4. Section of Mathematics, Department of Civil Engineering Democritus University of Thrace Xanthi Greece
5. General Department, Euripus Campus National and Kapodistrian University of Athens GR 34400 Athens Greece