1. Types and Declarative Static type Checking in Logic Programming;Asirelli,1984
2. Situations and Attitudes;Barwise,1983
3. Paraconsistent logic programming;Blair;J. Logic Programming,1989
4. An interesting subset of natural language;Colmerauer;Proc. Workshop on Logic and Database,1977
5. On database systems development through logic;Dahl;ACM Trans. Database Systems,1982