1. The temporal logic of branching time;Ben-Ari;Acta Inform.,1983
2. Behavioural equivalence relations induced by programming logics;Brookes,1983
3. Logiques du temps arborescent pour la spécification et la preuve de programmes;Graf,1983
4. A modal characterization of observational congruence on finite terms of CCS;Graf,1984
5. A logic for the specification and proof of controllable processes of CCS;Graf,1985