1. Department of Mathematics, College of Science, King Khalid University, Abha, Saudi Arabia
2. Department of Mathematics, Koneru Lakshmaiah Education Foundation, Guntur, India
3. Department of Mathematics, Gokaraju Rangaraju Institute of Engineering and Technology, Hyderabad, INDIA.
4. Department of Mathematics, S.V.A. Government College, Srikalahasti, INDIA.
5. Department of Mathematical Sciences, Fluid Dynamics and Survey Research Group, Federal University of Technology, Akure PMB, NIGERIA