Ankerst, M., Breunig, M. M., Kriegel, H.-P. & Sander, J.
(1999).
OPTICS: Ordering Points to Identify the Clustering Structure.
Proceedings of the 1999 ACM SIGMOD International Conference on Management of Data (p./pp. 49--60),
New York, NY, USA: ACM.
ISBN: 1-58113-084-8