Submitted on: 03 January 2001.
Revised on: 02 April 2001.
Accepted on: 22 April 2001.
___________________International Journal of Information Technology and Web Engineering
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Submitted on: 10 October 2000.
Revised on: 01 February 2001.
Accepted on: 26 February 2001.
___________________International Journal of Information Technology and Web Engineering
Submitted on: 20 May 2005.
Revised on: 20 July 2005.
Accepted on: 15 August 2005.
___________________International Journal of Information Technology and Web Engineering