Ahmed-Reda Berrah, Herve Glotin, Rafael Laboissiere and Louis-Jean Boe 1996. From Form to Formation of Phonetic Structures: An evolutionary computing perspective In: Terry Fogarty and Gilles Venturini, editors Proceedings of the ICML '96 workshop on Evolutionary Computing and Machine Learning pages 23--29

Louis-Jean Boše, Jean-Luc Schwartz and Nathalie Vallee 1995. The Prediction of Vowel Systems: perceptual Contrast and Stability In: Eric Keller, editor, Fundamentals of Speech Synthesis and Speech Recognition, John Wiley, pp. 185--213

Rene Carre and Mohammed Mrayati 1995. Vowel transitions, vowel systems and the Distinctive Region Model In: C. Sorin et al. (editors) Levels in Speech Communication: Relations and Interactions, Elsevier, pages 73--89

Noam Chomsky and Morris Halle 1968. The sound pattern of English, Cambridge, MS: MIT Press.

Bart de Boer 1997. A second report on emergent phonology, AI-memo 97-04, AI-lab, Vrije Universiteit Brussel

Barbara F. Grimes, editor 1996. Ethnologue: Languages of the World, 13 th edition, Summer Institute of Linguistics

Roman Jakobson and Morris Halle 1956. Fundamentals of Language, the Hague: Mouton & Co

L. Liljencrants and Bjšorn Lindblom 1972. Numerical simulations of vowel quality systems: The role of perceptual contrast, Language 48, pages 839-Bjšorn Lindblom, Peter MacNeilage and Michael

Studdert-Kennedy 1984. Self-organizing processes and the explanation of language universals In Brian Butterworth, Bernard Comrie, š Osten Dahl, editors Explanations for language universals, Berlin, Walter de Gruyter & Co Ian Maddieson 1984. Patterns of Sounds, Cambridge: Cambridge University Press

Luc Steels 1995. A Self-Organizing Spatial Vocabulary, Artificial Life 2, Cambridge (MS): MIT Press, pages 319--332

Luc Steels 1997a. Constructing and Sharing Perceptual Distinctions. In: Maarten van Someren and G. Widmer, editors: Proceedings of the ECML, Berlin: Springer Verlag. To appear.

Luc Steels 1997b. Synthesising the origins of language using co-evolution, self-organisation and level formation. In J. Hurford et al. editor, Evolution of Human Language, Edinburgh: Edinburgh University Press. To appear.

Kenneth N. Stevens 1989. On the quantal nature of speech. Journal of Phonetics 17, 1, pages 3--45