1. Improving software productivity;Boehm;Computer,1987
2. Evolving logical specification in information systems;Conrad,1998
3. Extending temporal logic for capturing evolving behaviour;Conrad,1997
4. ALBERT: A formal language and its supporting tools for requirements engineering;Dubois,1998
5. Sometimes “tomorrow” is “sometime”: Action refinement in a temporal logic of objects;Fiadeiro,1994