1. Complexity of Matching Problems;Benanav,1985
2. Hilbert's Tenth Problem is Unsolvable;Davis;Amer. Math. Monthly,1973
3. On the Sequential Nature of Unification;Dwork;J. of Logic Programming,1984
4. Abstract Properties of Substitutions and Unifiers;Eder;JSC 1,1985
5. Formes canoniques dans les algèbres booléennes, et application A la demonstration automatique en logique de premier ordre;Fages;Thèse, Université de Paris VI,1983