Maechler M, Rousseeuw P, Struyf A, Hubert M, Hornik K (2019). cluster: Cluster Analysis Basics and Extensions. R package version 2.1.0 — For new features, see the 'Changelog' file (in the package source).
@Manual{, title = {cluster: Cluster Analysis Basics and Extensions}, author = {Martin Maechler and Peter Rousseeuw and Anja Struyf and Mia Hubert and Kurt Hornik}, year = {2019}, note = {R package version 2.1.0 --- For new features, see the 'Changelog' file (in the package source)}, }