1. Ackerman, M., Ben-David, S.: Clusterability: A theoretical study. In: Proceedings of the Twelfth International Conference on Artificial Intelligence and Statistics, AISTATS 2009, Clearwater Beach, Florida, USA, April 16–18, pp. 1–8 (2009)
2. Angluin, D.: Queries and concept learning. Machine Learning 2(4), 319–342 (1988)
3. Arora, S., Raghavan, P., Rao, S.: Approximation schemes for euclidean-medians and related problems. In: STOC, pp. 106–113 (1998)
4. Arya, V., Garg, N., Khandekar, R., Meyerson, A., Munagala, K., Pandit, V.: Local search heuristics for k-median and facility location problems. SIAM J. Comput. 33(3), 544–562 (2004)
5. Awasthi, P., Zadeh, R.B.: Supervised clustering. In: Advances in Neural Information Processing Systems, pp. 91–99 (2010)