Alan Jeffrey. Abstract Timed Observation and Process Algebra. In Jos C. M. Baeten, Jan Friso Groote, editors, CONCUR 91, 2nd International Conference on Concurrency Theory, Amsterdam, The Netherlands, August 26-29, 1991, Proceedings. Volume 527 of Lecture Notes in Computer Science, pages 332-345, Springer, 1991.
Abstract is missing.