1. Affective Science. http://www.ncbi.nlm.nih.gov
2. Francis A.G., Mehta M.J., Ram A., Handbook of Research on Synthetic Emotion and Sociable Robotics (Hershey, NewYork, 2009)
3. Hirth J., Berns K., Humanoid robots, 97-116 (2009)
4. Towards Social Robots: Designing an Emotion-Based Architecture
5. Lueckert H.R., Lueckert I., Einfuehrung in die Kognitive Verhaltenstherapie: Allgemeine Grundlagen (Ernst Reinhardt Verlag, Munich 1994)