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Combining semantic and syntactic documentclassifiers to improve first story detection. Nicola S,Joe C. Proc.Of the 24th AnnualInt’’l:ACM SIGIR Conference . 2003
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Learning approaches for detecting and tracking news events. Yang Y,Carbonell J,Brown R,et al. IEEE Intelligent Systems: Special Issue on Applications of Intelligent Information Retrieval . 1999
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On-line new event detection and track-ing. Allan J,,Papka R,Lavrenko V. Proc.of SIGIR Conference on Research and Development in Information Retrieval . 1998