Comparing the comprehensibility of different synthetic voices in a dual task experiment. - Gerit P. Sonntag; Thomas Portele; Felicitas Haas (SSW, 1998)

Comparative evaluation of six German TTS systems. - Gerit P. Sonntag; Thomas Portele; Felicitas Haas; Joachim Köhler (EUROSPEECH, 1999)