1. Biundo, S., Wendemuth, A.: Companion-technology for cognitive technical systems. KI - Künstliche Intelligenz 30(1), 71–75 (2016)
2. Burkhardt, F., Paeschke, A., Rolfes, M., Sendlmeier, W., Weiss, B.: A database of German emotional speech. In: INTERSPEECH-2005, pp. 1517–1520, Lisbon, Portugal (2005)
3. Busso, C., Lee, S., Narayanan, S.S.: Using neutral speech models for emotional speech analysis. In: INTERSPEECH-2007, pp. 2225–2228. ISCA, Antwerp, Belgium (2007)
4. Busso, C., Metallinou, A., Narayanan, S.S.: Iterative feature normalization for emotional speech detection. In: Proceedings of the ICASSP 2011, pp. 5692–5695. IEEE, Prague, Czech Republic (2011)
5. Chang, C.C., Lin, C.J.: LIBSVM: A library for support vector machines. ACM Trans. Intell. Syst. Technol. (TIST) 2, 1–27 (2011)