R. Akbar, M. F. Hassan, M. A. Qureshi and S. Safdar
Information Technology Journal 10 ( 5 ): 1009 - 1016 , 2011
S. Safdar, M.F. Hassan, M.A. Qureshi and R. Akbar
Information Technology Journal 10 ( 6 ): 1161 - 1169 , 2011