1. W. A. Shaikh:
Department of Mathematics & Statistics, Quaid-e-Awam University of Engineering, Science & Technology Nawabshah, Sindh, Pakistan
2. A. Shaikh:
Department of Basic Sciences and Related Studies, Mehran University of Engineering & Technology, Jamshoro, Pakistan
3. K. B. Amur:
Department of Mathematics & Statistics, Quaid-e-Awam University of Engineering, Science & Technology Nawabshah, Sindh, Pakistan
4. M. Memon:
Department of Mathematics & Statistics, Quaid-e-Awam University of Engineering, Science & Technology Nawabshah, Sindh, Pakistan