1. G. Q. MEMON:
Department of Mathematics, Shah Abdul Latif University,Khairpur Mirs, Sindh,Pakistan
2. Z. A. KALHORO:
Institute of Mathematics and Computer Science, University of Sindh,Jamshoro, Sindh,Pakistan
3. A. W. SHAIKH:
Institute of Mathematics and Computer Science, University of Sindh,Jamshoro, Sindh,Pakistan
4. S. BHATTI:
Department of Basic Science and Related Studies, Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan