Eric Meisner Selma Sabanovic Volkan Isler Linnda Caporeal R. Caporeal Jeff Trinkle ShadowPlay: a generative model for nonverbal human-robot interaction. 117-124 2009 HRI http://doi.acm.org/10.1145/1514095.1514118 conf/hri/2009 db/conf/hri/hri2009.html#MeisnerAICT09