1. An introduction to abstract interpretation;Abramsky,1987
2. A declarative abstract semantics for logic programs;Barbuti,1989
3. A general framework for semantics-based bottom-up abstract interpretation of logic programs;Barbuti,1991
4. Contributions to the semantics of open logic programs;Bossi,1991
5. An instance of abstract interpretation integrating type and mode inferencing;Bruynooghe,1988