1. Cluster validity analysis using subsampling;Abul,2003
2. Sample size calculation;del Águila;Allergol. Immunopathol.,2014
3. An extensive comparative study of cluster validity indices;Arbelaitz;Pattern Recognit.,2013
4. A sober look at clustering stability;Ben-David,2006
5. Refining initial points for k-means clustering;Bradley,1998