Witold Staniszkis Edyta Kalka Grzegorz Nittner Eliza Staniszkis Jakub Strychowski Integration of Pre-existing Heterogeneous Information Sources in a Knowledge Management System. 507-514 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3183&spage=507 2004 conf/egov/2004 EGOV db/conf/egov/egov2004.html#StaniszkisKNSS04