ARTICLE Sanchez-Cortes_IEEETMM_2011/IDIAP A Nonverbal Behavior Approach to Identify Emergent Leaders in Small Groups Sanchez-Cortes, Dairazalia Aran, Oya Schmid Mast, Marianne Gatica-Perez, Daniel EXTERNAL https://publications.idiap.ch/attachments/papers/2012/Sanchez-Cortes_IEEETMM_2011.pdf PUBLIC IEEE Transactions on Multimedia 14 3-2 816-832 2012 10.1109/TMM.2011.2181941 doi