1. Finding similar questions in large question and answer archives;Jeon,2005
2. Retrieval models for question and answer archives;Xue,2008
3. Group non-negative matrix factorization with natural categories for question retrieval in community question answer archives;Zhou,2014
4. Searching questions by identifying question topic and question focus;Duan,2008
5. Bridging lexical gaps between queries and questions on large online Q&A collections with compact translation models;Lee,2008