@misc{indiciaead3af9638ea9,
  title = {Determining the Number of Clusters in a Data Set Without Graphical Interpretation},
  author = {Aguirre, Nathan S. and Davies, Misty D.},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20110016534},
  note = {Source identifier: 20110016534}
}