T. Gehrke, M. Huhn, P. Niebert, A. Rensink, and H. Wehrheim, “A Process Algebra Semantics for MSC Including Conditions,” in Formale Beschreibungstechniken f\'22ur verteilte Systeme, 8. GI/ITG-Fachgespr\'22ach, Cottbus, 4. und 5. Juni 1998, 1998, pp. 185--196.

T. Gehrke, M. Huhn, A. Rensink, and H. Wehrheim, “An Algebraic Semantics for Message Sequence Chart Documents,” in Formal Description Techniques and Protocol Specification, Testing and Verification, FORTE XI / PSTV XVIII’98, IFIP T W.1 Joint International Conference on Formal Description Techniques for Distributed Systems and Communication Protocols (FORTE XI) and Protocol Specification, Testing and Verification (PSTV XVIII), 3-6 November, 1998, Paris, France, 1998, pp. 3--18.

M. Huhn, P. Niebert, and H. Wehrheim, “Partial Order Reductions for Bisimulation Checking,” in Foundations of Software Technology and Theoretical Computer Science, 18th Conference, Chennai, India, December 17-19, 1998, Proceedings, 1998, pp. 271--282.

A. Rensink and H. Wehrheim, “Dependency-Based Action Refinement,” in Mathematical Foundations of Computer Science 1997, 22nd International Symposium, MFCS’97, Bratislava, Slovakia, August 25-29, 1997, Proceedings, 1997, pp. 468--477.

A. Rensink and H. Wehrheim, “Dependency-Based Action Refinement,” in Mathematical Foundations of Computer Science 1997, 22nd International Symposium, MFCS’97, Bratislava, Slovakia, August 25-29, 1997, Proceedings, 1997, pp. 468--477.

H. Wehrheim, Specifying reactive systems with action dependencies: modelling and hierarchical design. University of Hildesheim, Germany, 1996.

U. Goltz and H. Wehrheim, “Modelling Causality via Action Dependencies in Branching Time Semantics,” Inf. Process. Lett., no. 4, pp. 179--184, 1996.

U. Goltz and H. Wehrheim, “Causal Testing,” in Mathematical Foundations of Computer Science 1996, 21st International Symposium, MFCS’96, Cracow, Poland, September 2-6, 1996, Proceedings, 1996, pp. 394--406.

A. Rensink and H. Wehrheim, “Weak Sequential Composition in Process Algebras,” in CONCUR ’94, Concurrency Theory, 5th International Conference, Uppsala, Sweden, August 22-25, 1994, Proceedings, 1994, pp. 226--241.

H. Wehrheim, “Parametric Action Refinement,” in Programming Concepts, Methods and Calculi, Proceedings of the IFIP T/W.1/W.2/W.3 Working Conference on Programming Concepts, Methods and Calculi (PROCOMET ’94) San Miniato, Italy, 6-10 June, 1994, 1994, pp. 247--266.