2002

Dhillon, I. S.; Modha, D. S. & Spangler, W. S. (2002), 'Class visualization of high-dimensional data with applications', Computational Statistics & Data Analysis 41 (1) , 59-90 .
[BibTeX]  [Endnote] 

1997

Bezdek, J. C.; Li, W. Q.; Attikiouzel, Y. & Windham, M. (1997), 'A geometric approach to cluster validity for normal mixtures', Soft Computing - A Fusion of Foundations, Methodologies and Applications 1 (4) , 166--179 .
[BibTeX]  [Endnote] 

1990

Kaufman, L. & Rousseeuw, P. J. (1990), Finding Groups in Data: An Introduction to Cluster Analysis , John Wiley .
[BibTeX]  [Endnote] 

1971

Rand, W. (1971), 'Objective criteria for the evaluation of clustering methods', Journal of the American Statistical Association 66 (336) , 846-850 .
[BibTeX]  [Endnote]