L. Kaufman and
P.J. Rousseeuw.
Finding Groups in Data: An Introduction to Cluster Analysis.
John Wiley and Sons,
1990.
@book{KR90,
author = {Kaufman, L. and Rousseeuw, P.J.},
title={{Finding Groups in Data: An Introduction to Cluster Analysis}},
year = {1990},
publisher ={John Wiley and Sons},
}