1. General Education Department, Anhui Xinhua University, Anhui, People’s Republic of China
2. Department of Natural Sciences and Humanities, University of Engineering and Technology, Lahore(RCET), Pakistan
3. Department of Mathematics, Lahore College for Women University, Lahore, Pakistan
4. Basic Science Department, Preparatory Year Deanship, King Faisal University, Al Ahsa, Saudi Arabia