IFME: information filtering by multiple examples with under-sampling in a digital library environment. - Mingzhu Zhu; Chao Xu 004; Yi-fang Brook Wu (JCDL, 2013)

Task-Based User Profiling for Personalized Query Refinement. - Chao Xu 004 (Bull. IEEE Tech. Comm. Digit. Libr., 2013)

User Profiling for Query Refinement. - Chao Xu 004; Zhu Zhu; Yanchi Liu; Yi-Fang Wu (AMCIS, 2014)