Dinesh Garg Nanda Kambhatla Maja Vukovic Gopal Pingali Mining Top Issues from Contact Center Logs for Self Help Portals. 171-178 2008 IEEE SCC (2) http://doi.ieeecomputersociety.org/10.1109/SCC.2008.80 conf/IEEEscc/2008 db/conf/IEEEscc/scc2008.html#GargKVP08