Categorical perception of vowels. - Ellen Gerrits; Bert Schouten (ICSLP, 1998)

The nature of speech perception (The psychophysics of speech perception III). - Bert Schouten (Speech Commun., 2003)

The end of categorical perception as we know it. - Bert Schouten; Ellen Gerrits; Arjan van Hessen (Speech Commun., 2003)