Walsh, William, Craig Boutilier, Tuomas Sandholm, Rob Shields, George Nemhauser, and David Parkes. “Automated Channel Abstraction for Advertising Auctions”. Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 4, 2010): 887–894. Accessed May 21, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7641.