Frans Coenen Paul H. Leng Robert Sanderson Yanbo J. Wang Statistical Identification of Key Phrases for Text Classification. 838-853 2007 conf/mldm/2007 MLDM http://dx.doi.org/10.1007/978-3-540-73499-4_63 db/conf/mldm/mldm2007.html#CoenenLSW07