1. Research Department of Mathematics, Cauvery College for Women (Affiliated to Bharathidasan University), Tiruchirappalli 620018, Tamil Nadu, India
2. Department of Mathematics, Faculty of Arts and Science, Yildiz Technical University, Esenler, Istanbul 34210, Turkey
3. Department of Mathematics & Statistics, Faculty of Basic and Applied Sciences, International Islamic University Islamabad, Islamabad, Pakistan
4. Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia
5. Department of Mathematics, University of Aleppo, Aleppo, Syria