Shawn Bowers David Thau Rich Williams Bertram Ludäscher Data Procurement for Enabling Scientific Workflows: On Exploring Inter-ant Parasitism. 57-63 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3372&spage=57 2004 conf/semweb/2004swdb SWDB db/conf/semweb/swdb2004.html#BowersTWL04