1. Q. U. RANA:
Department of Basic Science and Related Studies, Mehran University of Engineering and Technology, Jamshoro, Pakistan
2. S. F. SHAH:
Department of Basic Science and Related Studies, Mehran University of Engineering and Technology, Jamshoro, Pakistan
3. J. G. M. SAHITO:
Sindh Agriculture University, Tandojam, Pakistan
4. M. S. CHANDIO:
Institute of Mathematics and Computer Science, University of Sindh, Jamshoro, Pakistan