Perceptual normalization of the vowels of a man and a child in various contexts. - Dick R. van Bergem; Louis C. W. Pols; Florien J. Koopmans-van Beinum (Speech Commun., 1988)

The role of 'given' and 'new in the production and perception of vowel contrasts in read text and in spontaneous speech. - Florien J. Koopmans-van Beinum; Dick R. van Bergem (EUROSPEECH, 1989)

Vowel reduction in natural speech. - Dick R. van Bergem; Florien J. Koopmans-van Beinum (EUROSPEECH, 1989)

The influence of sentence accent, word stress, and word class on the quality of vowels. - Dick R. van Bergem (EUROSPEECH, 1991)

The importance of spectral quality of vowels for the intelligibility of sentences. - Gitta P. M. Laan; Dick R. van Bergem; Florien J. Koopmans-van Beinum (EUROSPEECH, 1991)

On the perception of acoustic and lexical vowel reduction. - Dick R. van Bergem (EUROSPEECH, 1993)

The contribution of pitch contour, phoneme durations and spectral features to the character of spontaneous and read aloud speech. - Gitta P. M. Laan; Dick R. van Bergem (EUROSPEECH, 1993)

Acoustic vowel reduction as a function of sentence accent, word stress, and word class. - Dick R. van Bergem (Speech Commun., 1993)

A model of coarticulatory effects on the schwa. - Dick R. van Bergem (Speech Commun., 1994)

Experimental evidence for a comprehensive theory of vowel reduction. - Dick R. van Bergem (EUROSPEECH, 1995)

Perceptual and acoustic aspects of lexical vowel reduction, a sound change in progress. - Dick R. van Bergem (Speech Commun., 1995)