Giannis Verginadis Dimitris Gouscos Gregoris Mentzas Modeling e-Government Service Workflows Through Recurring Patterns. 483-488 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3183&spage=483 2004 conf/egov/2004 EGOV db/conf/egov/egov2004.html#VerginadisGM04