1. Popat p.: NP-hardness of euclidean sum-of-squares clustering;Aloise;Mach. Learn.,2009
2. k-means++: the advantages of careful seeding;Arthur,2007
3. Unsupervised feature selection for the k-means clustering problem;Boutsidis,2009
4. Random projections for k-means clustering;Boutsidis,2010
5. Refining initial points for k-means clustering;Bradley;ICML,1998