Programming Concepts, Methods and Calculi, Ernst-Rüdiger Olderog editor. (Proceedings of the IFIP TC2/WG2.1/WG2.2/WG2.3 Working Conference, Procomet ’94, San Miniato, Italy.) North-Holland | August 1994
Formal Techniques in Real-Time and Fault-Tolerant Systems, H. Langmaack, W.-P. de Roever, J. Vytopil editors. Lecture Notes in Computer Science, Springer-Verlag | July 1994