Koen V. Hindriks Stijn Hoppenbrouwers Catholijn M. Jonker Dmytro Tykhonov Automatic Issue Extraction from a Focused Dialogue. 204-216 2007 conf/nldb/2007 NLDB http://dx.doi.org/10.1007/978-3-540-73351-5_18 db/conf/nldb/nldb2007.html#HindriksHJT07