1. School of Mathematics, Hangzhou Normal University, Hangzhou 311121, China
2. North University Center of Baia Mare Technical University of Cluj Napoca Department of Mathematics and Computer Science, Victoriei 76, 430122 Baia Mare, Romania
3. Department of Mathematics, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
4. Department of Mathematics, College of Science, King Khalid University, Abha 61413, Saudi Arabia