Ryuichiro Higashinaka Yasuhiro Minami Hitoshi Nishikawa Kohji Dohsaka Toyomi Meguro Satoshi Kobashikawa Hirokazu Masataki Osamu Yoshioka Satoshi Takahashi Gen-ichiro Kikui Improving hmm-based extractive summarization for multi-domain contact center dialogues. 61-66 2010 SLT http://dx.doi.org/10.1109/SLT.2010.5700823 conf/slt/2010 db/conf/slt/slt2010.html#HigashinakaMNDMKMYTK10