Naveen Pandrangi Jyoti Jacob Anoop Sanka Sharma Chakravarthy WebVigiL: User Profile-Based Change Detection for HTML/XML Documents. 38-57 2003 conf/bncod/2003 BNCOD http://link.springer.de/link/service/series/0558/bibs/2712/27120038.htm db/conf/bncod/bncod2003.html#PandrangiJSC03