U.S.N. Raju, B. Eswara Reddy, V. Vijaya Kumar and B. Sujatha
Information Technology Journal 7 ( 6 ): 883 - 889 , 2008
K. Karteeka Pavan, V. Sesha Srinivas, A. SriKrishna and B. Eswara Reddy
Journal of Applied Sciences 12 ( 6 ): 587 - 592 , 2012