Eike Best, Raymond R. Devillers, Javier Esparza. General Refinement and Recursion Operators for the Petri Box Calculus. In Patrice Enjalbert, Alain Finkel, Klaus W. Wagner, editors, STACS 93, 10th Annual Symposium on Theoretical Aspects of Computer Science, Würzburg, Germany, February 25-27, 1993, Proceedings. Volume 665 of Lecture Notes in Computer Science, pages 130-140, Springer, 1993.
Abstract is missing.