ELKI references overview:

de.lmu.ifi.dbs.elki.application.greedyensemble.VisualizePairwiseGainMatrix
E. Schubert, R. Wojdanowski, A. Zimek, H.-P. Kriegel
On Evaluation of Outlier Rankings and Outlier Scores
In: Proc. 12th SIAM International Conference on Data Mining (SDM), Anaheim, CA, 2012.
http://dx.doi.org/10.1137/1.9781611972825.90
de.lmu.ifi.dbs.elki.visualization.visualizers.pairsegments.CircleSegmentsVisualizer
Elke Achtert, Sascha Goldhofer, Hans-Peter Kriegel, Erich Schubert, Arthur Zimek
Evaluation of Clusterings – Metrics and Visual Support
In: Proc. 28th International Conference on Data Engineering (ICDE) 2012
http://dx.doi.org/10.1109/ICDE.2012.128
de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.density.DensityEstimationOverlay$Instance
D. W. Scott
Multivariate density estimation: Theory, Practice, and Visualization
In: Multivariate Density Estimation: Theory, Practice, and Visualization
http://dx.doi.org/10.1002/9780470316849
de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.outlier.BubbleVisualization
E. Achtert, H.-P. Kriegel, L. Reichert, E. Schubert, R. Wojdanowski, A. Zimek
Visual Evaluation of Outlier Detection Models
In: Proceedings of the 15th International Conference on Database Systems for Advanced Applications (DASFAA), Tsukuba, Japan, 2010
http://dx.doi.org/10.1007/978-3-642-12098-5_34
de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.outlier.COPVectorVisualization
Hans-Peter Kriegel, Peer Kröger, Erich Schubert, Arthur Zimek
Outlier Detection in Arbitrarily Oriented Subspaces
In: Proc. IEEE International Conference on Data Mining (ICDM 2012)
http://dx.doi.org/10.1109/ICDM.2012.21