1. conferences, and is an expansion of a related survey that I wrote for the Foundations and
2. John Lafferty, and ChengXiang Zhai, Document language models, query models, and risk minimization for information retrieval . InProceedings of SIGIR'01, pp.111 -119 ,Sept.2001 . DOI: 10.1145/383952.38397010.1145/383952.383970
3. Tao Tao, Xuanhui Wang, Qiaozhu Mei, and ChengXiang Zhai, Language model information retrieval with document expansion . InProceedings of the main conference on Human Language Technology Conference of the North American Chapter of the Association of Computational Linguistics, pp.407 -414 ,Morristown, NJ,2006 . Association for Computational Linguistics. DOI: 10.3115/1220835.122088710.3115/1220835.1220887