- N. Fuhr (1991).
- Probabilistic Retrieval for Imprecise Queries. Report DV II 91-3, TH Darmstadt, FB Informatik, Datenverwaltungssysteme II
- N. Fuhr (1991).
- An Information Retrieval View of Environmental Information Systems. In: Database and Expert System Applications. Springer, Heidelberg et al..
- N. Fuhr; C. Buckley (1991).
- A Probabilistic Learning Approach for Document Indexing. ACM Transactions on Information Systems 9(3)
- N. Fuhr; S. Hartmann; G. Knorz; G. Lustig; M. Schwantner; K. Tzeras (1991).
- AIR/X - a Rule-Based Multistage Indexing System for Large Subject Fields. In: Proceedings of the RIAO'91, Barcelona, Spain, April 2-5, 1991
- N. Fuhr; T. Hoffmann (1991).
- A Prototype for Integrating Probabilistic Fact and Text Retrieval. In: Wissensbasierte Informationssysteme und Informationsmanagement, Universitätsverlag Konstanz
- N. Fuhr; U. Pfeifer (1991).
- Combining Model-Oriented and Description-Oriented Approaches for Probabilistic Indexing. In: Proceedings of the Fourteenth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. ACM, New York.
