1. Finding high-quality content in social media;Agichtein,2008
2. Evolutionary algorithms;Alba,2005
3. Bian, J., Liu, Y., Agichtein, E., & Zha, H. (2008). Finding the right facts in the crowd: Factoid question answering over social media. In World Wide Web conference series (pp. 467–476).
4. Quadripartite graph-based clustering of questions;Blooma,2011
5. Blooma, M. J., & Kurian, J. C., 2011. Research issues in community based question answering. In Proceedings of the 2011 Pacific Asia conference on information systems (PACIS).