1. Clavel, C., Vasilescu, I., Devillers, L., et al. (2008). Fear-type emotion recognition for future audio-based surveillance systems. Speech Communication, 50(6), 487–503.
2. Ramakrishnan, S., & Emary, I. M. M. E. I. (2013). Speech emotion recognition approaches in human computer interaction. Telecommunication Systems, 52(3), 1467–1478.
3. Cynthia, B., & Aryananda, L. (2002). Recognition of affective communicative intent in robot-directed speech. Kluwer Academic Publishers, 12(1), 83–104.
4. Li, Z., & Huang, C. W. (2014). Key technologies in practical speech emotion recognition. Journal of Data Acquisition and Processing, 29(2), 157-170.
5. Zhang, X. D., Huang, C. W., Zhao, L., & Zou, C. R. (2014). Recognition of practical speech emotion using improved shuffled frog leaping algorithm. Chinese Journal of Acoustics,
34(4), 441–456.