1. Ketter, W., Peters, M., Collins, J.: Autonomous agents in future energy markets: the 2012 power trading agent competition. In: Proceedings of the AAAI Conference on Artificial Intelligence, pp. 1298–1304 (2013)
2. Wellman, M.P., Greenwald, A., Stone, P., Wurman, P.R.: The 2001 trading agent competition. Electron. Mark. 13(1), 4–12 (2003)
3. Arthur, D., Vassilvitskii, S.: k-means++: the advantages of careful seeding. In: Proceedings of the ACM-SIAM Symposium on Discrete Algorithms, pp. 1027–1035 (2007)
4. Kaufman, L., Rousseeuw, P.: Clustering by Means of Medoids. North-Holland, Amsterdam (1987)
5. Ester, M., Kriegel, H.P., Sander, J., Xu, X.: A density-based algorithm for discovering clusters in large spatial databases with noise. In: Proceedings of the Conference on Knowledge Discovery and Data Mining, pp. 226–231 (1996)