Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takashi Matsuyama and Tomoki Nishide and Kei Shimonishi and Hiroaki Kawashima,Voting-Based Backchannel Timing Prediction Using Audio-Visual Information,Proceedings of the Fourth International Conference on Human Agent Interaction,,ACM,2016-10-04,,,229-232,https://cir.nii.ac.jp/crid/1871428067468551808,https://doi.org/10.1145/2974804.2980501