@INPROCEEDINGS{Babuska2002ImprovedCovarianceEstimation,
author    = {R. Babu\v{s}ka and P.J. van der Veen and U. Kaymak},
title     = {Improved Covariance Estimation for {G}ustafson--{K}essel Clustering},
booktitle = {Proceedings of the 2002 IEEE International Conference on Fuzzy Systems},
address   = {Honolulu, Hawaii},
month     = may,
volume    = {2},
pages     = {1081--1085},
year      = 2002
}