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Top level » Classic Information Retrieval » IR (language) models » Temporal Models Estimation Methods for Ranking Recent Information  Miles Efron, Gene Golovchinsky Ranking recent information (blog post)  Miles Efron Time-aware Approaches to Information Retrieval  Nattiya Kanhabua Time-Based Language Models  Xiaoyan Li, W. Bruce Croft USC/ISI at TREC 2011: Microblog Track  Donald Metzler, Congxing Cai