TY - CHAP A1 - Guizzardi, Giancarlo A1 - Wagner, Gerd A1 - Guarino, Nicola A1 - Sinderen, Marten van ED - Persson, Anne T1 - An Ontologically Well-Founded Profile for UML Conceptual Models T2 - Advanced information systems engineering, 16th international conference, proceedings, CAiSE 2004, Riga, Latvia, June 7 - 11, 2004 Y1 - 2004 SN - 3-540-22151-4 SP - 112 EP - 116 PB - Springer CY - Berlin [u.a.] ER - TY - CHAP A1 - Guizzardi, Giancarlo A1 - Wagner, Gerd A1 - Sinderen, Marten van ED - Büchel, Gregor ED - Klein, Bertin T1 - A Formal Theory of Conceptual Modeling Universals Y1 - 2004 UR - http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-112/ ER -