1. Ai H, Litman D, Forbes-Riley K, Rotaru M, Tetreault J, Purandare A (2006) Using system and user performance features to improve emotion detection in spoken tutoring dialogs. In: Proceedings of the Interspeech, Pittsburgh, PA, September 17–21, pp 797–800
2. Ang J, Dhillon R, Shriberg E, Stolcke A (2002) Prosody-based automatic detection of annoyance and frustration in human-computer dialog. In: Proceedings of the Interspeech, Denver, September 16–20, pp 2037–2040
3. Arunachalam S, Gould D, Anderson E, Byrd D, Narayanan S (2001) Politeness and frustration language in child-machine interactions. In: Proceedings of the Eurospeech, Aalborg, September 3–7, pp 2675–2678
4. Athanaselis T, Bakamidis S, Dologlu I, Cowie R, Douglas-Cowie E, Cox C (2005) ASR for emotional speech: clarifying the issues and enhancing performance. Neural Netw. 18:437–444
5. Ayadi MMHE, Kamel MS, Karray F (2007) Speech emotion recognition using gaussian mixture vector autoregressive models. In: Proceedings of ICASSP, Honolulu, April 15–20, pp 957–960