Manfred Broy. Interactive and Reactive Systems: States, Observations, Experiments, Input, Output, Nondeterminism, Compositionality and all That. In Christian Freksa, Matthias Jantzen, Rüdiger Valk, editors, Foundations of Computer Science: Potential - Theory - Cognition, to Wilfried Brauer on the occasion of his sixtieth birthday. Volume 1337 of Lecture Notes in Computer Science, pages 279-286, Springer, 1997. [doi]
Abstract is missing.