Toshihiko Itoh Atsuhiko Kai Tatsuhiro Konishi Yukihiro Itoh Linguistic and acoustic changes of user²s utterances caused by different dialogue situations. 2002 INTERSPEECH https://doi.org/10.21437/ICSLP.2002-188 conf/interspeech/2002 db/conf/interspeech/interspeech2002.html#ItohKKI02 545-548