M. Jawed Iqbal
1Institute of Space and Planetary Astrophysics, University of Karachi, Karachi, Pakistan; Department of Mathematics, University of Karachi, Karachi, Pakistan
Zaeemuddin Ali
Institute of Space and Planetary Astrophysics, University of Karachi, Karachi, Pakistan
S. Shahid Ali
Department of Geography, University of Karachi, Karachi, Pakistan