| 1991 | Updates with Equality: Beyond the Herbrand Universe Assumption. | Marianne Winslett, Seng-cho Timothy Chou |
| 1991 | The Roles of Artificial Intelligence in Information Systems. | Gio Wiederhold |
| 1991 | Semantic Extensions to Text Retrieval. | Edgar B. Wendlandt, James R. Discroll |
| 1991 | A Semantic Analysis of Monotonic Inheritance with Roles and Relations. | Richmond H. Thomason |
| 1991 | An Analysis of Property-Flow View vs Individual-Flow View of Inheritance. | Krishnaprasad Thirunarayan |
| 1991 | Combining Time Points and Time Intervals in a Hybrid Knowledge Representation Formalism. | Paolo Terenziani |
| 1991 | Input Understanding as a Basis for Multistrategy Task-Adaptive Learning. | Gheorghe Tecuci, Ryszard S. Michalski |
| 1991 | Note on Resolution Circuits. | Zbigniew Stachniak |
| 1991 | A Study of Crossover Operators in Genetic Programming. | William M. Spears, Vic Anand |
| 1991 | Percept Conceptualizations and Their Knowledge Representation Schemes. | Michael W. Sobolewski |
| 1991 | Distance Metrics for Instance-Bsed Learning. | Steven Salzberg |
| 1991 | On Interval-based Temporal Planning: An IQ Strategy. | Barry Richards, Yuejun Jiang, H. Choi |
| 1991 | A Model of Information Sharing for Fault-Tolerant Flexible Manufacturing Systems. | Zbigniew W. Ras, Jing Xiao |
| 1991 | Disjunctive Logic Programs and Constrain Processing. | Arcot Rajasekar |
| 1991 | Generalization Handling in a Dynamic Case Memory. | Luigi Portinale |
| 1991 | Completeness for Propositional Logic Programs with Negation. | Jan A. Plaza |
| 1991 | Fully Deadline-Coupled Planning: One Step at a Time. | Madhura Nirkhe, Sarit Kraus, Donald Perlis |
| 1991 | How Well Are Non-Horn Clauses Handled? | Xumin Nie |
| 1991 | Stable Model Semantics for Probabilistic Deductive Databases. | Raymond T. Ng, V. S. Subrahmanian |
| 1991 | The Multi-Player Version of Minimax Displays Game-Tree Pathology. | David Mutchler |
| 1991 | Resolution and Path Dissolution in Multi-Valued Logics. | Neil V. Murray, Erik Rosenthal |
| 1991 | Using Normal Deduction Graphs in Default Reasoning. | Ricardo A. Munoz, Chao-Chih Yang |
| 1991 | Personal Learning Apprentices. | Tom M. Mitchell |
| 1991 | Typicality Constants and Range Defaults: Some Pros and Cons of a Cognitive Model of Default Reasoning. | Michael J. Miller, Donald Perlis |
| 1991 | Generation of Classification Rules. | Maciej Michalewicz, Zbigniew Michalewicz |