Financial support by the following organizations is gratefully acknowledged
University Research Fund, Faculty of Natural Sciences, Quaid-i-Azam University, Islamabad, Pakistan
The Higher Education Commission of Pakistan
"Every-day I remind myself that my inner
and outer life are based on the labors of other men, living and dead, and that
I must exert myself in order to give in the same measure as I have received and
am still receiving"
Albert Einstein
