Jos C. M. Baeten, Rob J. van Glabbeek. Another Look at Abstraction in Process Algebra (Extended Abstract). In Thomas Ottmann, editor, Automata, Languages and Programming, 14th International Colloquium, ICALP87, Karlsruhe, Germany, July 13-17, 1987, Proceedings. Volume 267 of Lecture Notes in Computer Science, pages 84-94, Springer, 1987.
Abstract is missing.