1. Recollections of logicians, mathematicians and philosophers;Logic Journal of the IGPL;2022-06-14
2. Maximal Deductive Systems and Injective Objects in the Category of Hilbert Algebras;Zeitschrift für Mathematische Logik und Grundlagen der Mathematik;1988
3. Ordered Sets and Duality for Distributive Lattices;Orders: Description and Roles - In Set Theory, Lattices, Ordered Groups, Topology, Theory of Models and Relations, Combinatorics, Effectiveness, Social Sciences, Proceedings of the Conference on Ordered Sets and their Application Château dc la Tourcttc; Ordres: Description et Rôles - En Théorie des Treillis, des Groupes Ordonnés; en Topologie, Théorie des Modèles et des Relations, Cornbinatoire, Effectivité, Sciences Sociales, Actes de la Conférence sur ies Ensembles Ordonnés et leur Applications Château de la Tourette;1984