with : Harald Störrle

9th International Workshop on Petri Nets and Software Engineering (PNSE'15) — 24/06/2015–25/06/2015

5th International Workshop on Modelling of Objects, Components and Agents (MOCA'09 @ MATES 2009) — 11/09/2009

International Workshop on Organizational Modeling (ORGMOD 2009 @ Petri Nets 2009) — 22/06/2009–23/06/2009