1. Bever, T. G.: 1970, ‘The cognitive basis for linguistic structures’, in J. R. Hayes (ed.), Cognition and the Development of Languages, Wiley, New York, pp. 279–362.
2. Butterworth, B.: 1983, ‘Lexical representation’, in B. Butterworth (ed.), Language Production, Academic Press, London, Vol. 2, pp. 257–294.
3. Caramazza, A., Laudanna, A. and Romani, C.: 1988, ‘Lexical access and inflectional morphology’, Cognition 28, 297–332.
4. Clark, H. H. and Clark, E. V.: 1978, Psychology and Language, Harcourt Brace Jovanovich, New York.
5. Eriksen, B. A. and Eriksen, C. W.: 1974, ‘The importance of being first: A tachistoscopic study of the contribution of each letter to the recognition of four-letter words’, Perception and Psychophysics 15, 66–72.