1. Berger J (1998) Instrumentelle Verfahren zur Sprachqualitätsschätzung — Modelle auditiver Tests (Instrumental methods for speech-quality estimation — models of auditory tests). Shaker, Aachen
2. Bernsen N O, Dybkjær H, Dybkjær L (1998) Designing interactive speech systems: from first ideas to user testing. Springer, Berlin
3. Bimbot F, Chollet G (1997) Assessment of speaker verification systems. In: Gibbon D, Moore R, Winski R (eds) Handbook of standards and resources for spoken language systems 408–480. Mouton de Gruyter, Berlin
4. Blauert J (1997) Spatial hearing: the psychophysics of human sound localization, 2nd rev edn. MIT Press, Cambridge
5. Danieli M, Gerbino E (1995) Metrics for evaluating dialogue strategies in a spoken language system. In: Empirical methods in discourse interpretation and generation. 1995 AAAI Symp, Stanford CA 34–39. AAAI Press, Menlo Park