A. W. Shaikh
Institute of Mathematics and Computer Science, University of Sindh, Jamshoro, Pakistan
M. R. Muree
Institute of Mathematics and Computer Science, University of Sindh, Jamshoro, Pakistan
A. A. Memon
Institute of Mathematics and Computer Science, University of Sindh, Jamshoro, Pakistan
U. A. Rind
Department of Statistics, University of Sindh, Jamshoro, Pakistan