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2. Ahn, R. (1995b) Logical Model of the Electron Microscope. DenK Report 95/15, Tilburg University.
3. Ahn, R. (1996) Monotonic description of dynamic worlds. In: Proc. NIAC'96 Conference (forthc.)
4. Ahn, R. & Kolb, H.P. (1990) Discourse Representation meets Constructive Mathematics. In: Kálmán, L. & Pólos, L. (eds.) Papers from the Second Symposium on Logic and Language, Akademiai Kiadó, Budapest, 105–124.
5. Ahn, R., Kievit, L., Rentier, M. Verlinden, M. (1995) Two Levels of Semantic Representation in DenK. In: T. Andernach, M. Moll & A. Nijholt (eds.) Papers from the Fifth CLIN Meeting. Universiteit Twente, 35–58.