1. Department of Mathematics, Vignan’s Foundation for Science, Technology & Research, Vadlamudi-522213, Andhra Pradesh, India
2. Department of Applied Mathematics, School of Applied Natural Sciences, Adama Science and Technology University, Post Box No. 1888, Adama, Ethiopia
3. Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Vellore-632014, Tamil Nadu, India