Ioannis L. Kotsiopoulos Torsten Engel Frank-Walter Jaekel Kurt Kosanke Juan Carlos Mendez Barreiro Angel Ortiz Bas Michaël Petit Patric Raynaud Steps in Enterprise Modelling. 337-345 2002 conf/ifip5-12/2002 ICEIMT db/conf/ifip5-12/ifip5-12-2002.html#KotsiopoulosEJKBBPR02