Song, Yang and Zhuang, Ziming and Li, Huajing and Zhao, Qiankun and Li, Jia and Lee, Wang-Chien and Giles, C. Lee. Real-time automatic tag recommendation. SIGIR '08: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval. 515--522, ACM, New York, NY, USA, Year 2008.