1. The existence of refinement mappings;Abadi;Theoret. Comput. Sci.,1991
2. Composing specifications;Abadi;ACM Trans. on Programming Languages Systems,1993
3. Conjoining specifications;Abadi;Tech. Report 118, SRC DEC,1993
4. A logical view of composition;Abadi;Theoret. Comput. Sci.,1993
5. Defining liveness;Alpern;Inform. Process. Lett.,1985