1. Department of Mathematics, Institute of Applied Sciences and Humanities, G.L.A. University, Mathura-281 406, Uttar Pradesh, India.
2. Mathematics Department, Deanery of Academic Services, Taibah University, Saudi Arabia.
3. Astronomy Department, National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt.
4. Laboratory of Information Technologies, Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia.