1. Dept. of Applied Mathematics, Priyadarshini Institute of Engineering and Technology, Hingna Road, Nagpur-440019, Maharashtra, India
2. Dept. of Mathematics, Rashtrasant Tukadoji Maharaj Nagpur University, Mahatma Jyotiba Phule Educational Campus, Amravati Road, Nagpur-440033, Maharashtra, India
3. Dept. of Mathematics, Vidya Vikas Arts Commerce and Science College, Samudrapur-442305, Dist. Wardha, Maharashtra, India