Rik Eshuis

Rik Eshuis, Roel Wieringa: A Real-Time Execution Semantics for UML Activity Diagrams, Fundamental Approaches to Software Engineering, 4th International Conference, FASE 2001, 2001, (BibTeX entry).
Rik Eshuis, Roel Wieringa: An Execution Algorithm for UML Activity Graphs, Fourth International Conference on the Unified Modeling Language: UML 2001, 2001, (BibTeX entry).
Rik Eshuis, Roel Wieringa: Requirements Level Semantics for UML Statecharts, Kluwer Academic Publishers, 2000, (BibTeX entry).

dblp: Computer Science Bibliography (University of Trier, Germany). (Note that this does not always work due to different naming schemes.)