1. Department of Engineering Mathematics Koneru Lakshmaiah Education Foundation Guntur Andhra Pradesh India
2. Department of Mathematics Bharathidasan University Tiruchirappalli Tamil Nadu India
3. Department of Mathematics Seethalakshmi Ramaswami College Tiruchirappalli Tamil Nadu India
4. Department of Mathematics Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham Coimbatore Tamil Nadu India