1. Amsterdam library of object images (aloi) (2004).
http://aloi.science.uva.nl/
2. Example data sets for elki (2013).
http://elki.dbs.ifi.lmu.de/wiki/DataSets
3. Arbelaez, A., Quesada, L.: Parallelising the k-meds clustering problem using space-partitioning. In: Proceedings of the Sixth Annual Symposium on Combinatorial Search, SOCS, Leavenworth, Washington, USA, 11–13 July 2013
4. Arthur, D., Vassilvitskii, S.: k-means++: the advantages of careful seeding. In: Proceedings of the Eighteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA, pp. 1027–1035, New Orleans, Louisiana, USA, 7–9 January 2007
5. Asuncion, A., Newman, D.: UCI machine learning repository datasets (2007).
https://archive.ics.uci.edu/ml/datasets.html