1. Arampatzis, A. T. & Tsoris, T. (1996). A Linguistic Approach to Information Retrieval. M.Sc. thesis, Patras University, Patras
2. Arampatzis, A. T., Tsoris, T. & Koster, C. H. A. (1997a). Irena: information retrieval engine based on natural language analysis. In Proceedings of RIAO'7 Computer-Assisted Information Searching on Internet, pp. 159–175. McGill University, Montreal
3. Arampatzis, A. T., van der Weide, T. P., van Bommel, P. & Koster, C. H. A. (1997b). Syntactical Analysis for Text Filtering. Technical Report CSI-R9721, Computing Science Institute, University of Nijmegen, Nijmegen
4. Bruza, P. D. (1993). Stratified Information Disclosure: A Synthesis between Information Retrieval and Hypermedia. Ph.D. thesis, University of Nijmegen, Nijmegen
5. Bruza, P. D. and IJdens, J. J. (1994) Efficient Probabilistic Inference through Index Expression Belief Networks. In Proceedings of the Seventh Australian Joint Conference on Artificial Intelligence (AI94), pp. 592–599. World Scientific