Hitoshi Iida Masashi Okamoto Katsuya Takanashi LIBM 2008 - First International Workshop on Laughter in Interaction and Body Movement. 273-274 2008 JSAI http://dx.doi.org/10.1007/978-3-642-00609-8_23 conf/jsai/2008 db/conf/jsai/jsai2008.html#IidaOT08