WASET
    Robert Niese and  Ayoub Al-Hamadi and  Bernd Michaelis,  Analysis of Feature Space for a 2d/3d Vision based Emotion Recognition Method.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 2156 - 2161
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/4039.