1. J.E. Rogers, W.D. Solomon, A.L. Rector, P. Pole, P. Zanstra, E. van der Haring, Rubrics to dissections to GRAIL to classifications, in: C. Pappas, N. Maglaveras, J.-R. Scherrer (Eds.), Medical Informatics Europe ’97, IOS Press, Amsterdam, 1997, pp. 241–245.
2. A. Rector, Compositional models of medical concepts: towards re-usable application independent medical terminologies, in: P. Barahona, J.P. Christensen (Eds.), Knowledge and Decisions in Health Telematics, IOS Press, Amsterdam, 1994 pp. 109–114.
3. A.L. Rector, Thesauri and Formal Classifications: Terminologies for People and Machines, in: IMIA WG6, Conference on Natural Language and Medical Concept Representation. Preprints. (To appear in Meth. Inform. Med.) 1997, pp. 183–195.
4. W. Ceusters, F. Buekens, G. De Moor, A. Waagmeester, The distinction between linguistic and conceptual semantics in medical terminology and its implications for NLP-based knowledge acquisition, in: IMIA WG6, Conference on Natural Language and Medical Concept Representation. Preprints. (To appear in Meth. Inform. Med.), 1997, pp. 71–80.
5. W. Ceusters, G. Deville, F. Buekens, The chimera of purpose- and language-independent concept systems in health care, in: P. Barahona, M. Veloso, J. Bryants (Eds.), Medical Informatics Europe ‘94 (MIE 94), Proceedings, 1994, pp. 208–212.