1. Department of Mathematics, Gokaraju Rangaraju Institute of Engineering and Technology, Hyderabad, Telangana, India
2. Department of Mathematics, Government Degree College, Mydukur, Andhra Pradesh, India
3. Department of Mathematics, Government Degree College, Rajampet, Andhra Pradesh, India
4. Department of Chemistry, Government Degree College for Men (A), Kadapa, Andhra Pradesh, India