Anup Chalamalla Sumit Negi L. Venkata Subramaniam Ganesh Ramakrishnan Identification of class specific discourse patterns. 1193-1202 2008 CIKM http://doi.acm.org/10.1145/1458082.1458240 conf/cikm/2008 db/conf/cikm/cikm2008.html#ChalamallaNSR08