@article{anaposterioricalclusterabilitycriterion,
  title = {An Aposteriorical Clusterability Criterion for $k$-Means++ and Simplicity of Clustering},
  author = {Mieczysław A. Kłopotek},
  year = {2017},
  eprint = {1704.07139},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1704.07139v2},
}