A. K. Khattak
Department of Chemistry, Gomal University, Dera Ismail Khan, Pakistan
K. Mahmood
Department of Chemistry, Gomal University, Dera Ismail Khan, Pakistan
M. Afzal
Department of Chemistry, Quaid-i Azam University, Islamabad, Pakistan
M. Saleem
Department of Chemistry, Quaid-i Azam University, Islamabad, Pakistan
A. Qadeer
Pakistan Atomic Energy Commission (PAEC), Islamabad, Pakistan