Dhillon, Inderjit S. ; Modha, Dharmendra S. ; Spangler, W. Scott: Class visualization of high-dimensional data with applications. In: Computational Statistics \& Data Analysis, 41 (2002), Nr. 1, S. 59-90
Bezdek, J. C. ; Li, W. Q. ; Attikiouzel, Y. ; Windham, M.: A geometric approach to cluster validity for normal mixtures. In: Soft Computing - A Fusion of Foundations, Methodologies and Applications, 1 (1997), Nr. 4, S. 166--179
Kaufman, L. ; Rousseeuw, P. J.: Finding Groups in Data: An Introduction to Cluster Analysis : John Wiley, 1990. - ISBN 1-58133-109-7
Rand, W.M.: Objective criteria for the evaluation of clustering methods. In: Journal of the American Statistical Association , 66 (1971), Nr. 336, S. 846-850