1. 8th ad auctions workshop. http://sites.google.com/site/adauctions2012/ .
2. Aggarwal, G., Feldman, J., Muthukrishnan, S., & Pál, M. (2008). Sponsored search auctions with Markovian users. In Workshop on Internet and network economics (WINE) (pp. 621–628).
3. Aggarwal, G., Goel, A., & Motwani, R. (2006). Truthful auctions for pricing search keywords. In ACM conference on electronic commerce (EC) (pp. 1–7).
4. Apex Pacific. http://www.apexpacific.com/index.html .
5. Ashkan, A., & Clarke, C. L. A. (2009). Characterizing commercial intent. In Conference on information and knowledge management (CIKM) (pp. 67–76).