Static and Dynamic Semantics of Entity-Relationship Models Based on Algebraic Methods. - Ingo Claßen; Michael Löwe; Susanne Waßerroth; Jan Wortmann (GI Jahrestagung, 1994)

Enterprise Modelling with FUNSOFT Nets. - Sebastian Erdmann; Jan Wortmann (EDOC, 1997)

Concurrent requirements engineering with a UML subset based on component schema relationships. - Jan Wortmann (2001)