Mahdi AzhiniAssistant Professor of Mathematics, Islamic Azad University, Science and research branchVerified email at srbiau.ac.ir
Oluwatosin Temitope MewomoSchool of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, Durban, SouthVerified email at ukzn.ac.za
Farshid KhojastehDepartment of Mathematics, Islamic Azad University, Arak-Branch, Arak, Iran