1. Applied Mathematics and Humanities Department; Sardar Vallabhbhai National Institute of Technology; Ichchhanath Mahadev, Dumas Road Surat Gujarat 395 007 India
2. Department of Mathematics; Birla Vishwakarma Mahavidyalaya Engineering College; Vallabh Vidyanagar Anand Gujarat 388 120 India
3. L. 1627 Awadh Puri Colony Beniganj, Phase-III; Opposite - Industrial Training Institute (ITI); Ayodhya Main Road Faizabad Uttar Pradesh 224 001 India