1. ‘Introduction to Logic Programming’, report TR-87–35;Apt,1987
2. ‘Maintenance of Stratified Databases Viewed as a Belief Revision System’;Apt;Laboratoire d'Informatique, Ecole Normale Superieure, LIENS-87–1, Paris,1987
3. ‘Deontic Logic’;Aqvist,1984
4. ‘Noun Phrases, Generalized Quantifiers and Anaphora’;Barwise,1987
5. ‘Dialectical Dynamics within Formal Logics’;Batens;Logique et Analyse,1986