1. Some practical properties of logic programming interpreters;Brough,1984
2. Prolog and infinite trees;Colmerauer,1982
3. Fundamental properties of infinite trees;Courcelle;Theor. Comput. Sci.,1983
4. Les graphes orientés ponderés: Un outils pour la programmation logic;Devienne,1987
5. Weighted graphs: a tool for expressing the behaviour of recursive rules in Logic Programming;Devienne,1988