Sanjeev Jain, Venkateswarlu Pitti and Bhupendra Verma
Asian Journal of Information Technology 5 ( 4 ): 454 - 459 , 2006
Bhupendra Verma, Sanjeev Jain and D.P. Agarwal
Asian Journal of Information Technology 6 ( 4 ): 430 - 435 , 2007