Rukavina, S. , Gruss, S. , Walter, S. , Hoffmann, H. , Traue, H.. "OPEN_EmoRec_II- A Multimodal Corpus of Human-Computer Interaction". World Academy of Science, Engineering and Technology, Open Science Index 101, International Journal of Computer and Information Engineering, (2015), 9(5), 1216 - 1222.