1. Atomic toposes;Barr;J. Pure Appl. Algebra,1980
2. Molecular toposes;Barr;J. Pure Appl. Algebra,1980
3. Toposes, triples and theories;Barr,1985
4. Bottom-up computations of recursive programs;Berry;RAIRO Inform. Théor.,1976
5. Program equivalence and canonical forms in stable discrete interpretations;Berry,1976