[1]
Charrad, M., Ghazzali, .N., Boiteau, V. and Niknafs, A. 2014. NbClust: An R Package for Determining the Relevant Number of Clusters in a Data Set. Journal of Statistical Software. 61, 6 (Nov. 2014), 1–36. DOI:https://doi.org/10.18637/jss.v061.i06.