1. Department of Applied Sciences and Humanities, Faculty of Engineering and Technology, Jamia Millia Islamia (A Central University), New Delhi-110025 (India)
2. Mathematics Section, Mewat Engineering College (Waqf), Palla, Nuh, Mewat-122107, Haryana (India)
3. Department of Applied Sciences and Humanities, Aryabhat Polytechnic, G. T. Karnal Road, Delhi-110033 (India)