@inproceedings{ijcai1971p42,
  title     = {A Nonparametric Valley-Seeking Technique for Cluster Analysis},
  author    = {Koontz, Warren L. G. and Fukunaga, Keinosuke},
  booktitle = {Proceedings of the Second International Joint Conference on
               Artificial Intelligence, {IJCAI-71}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {D.C. Cooper},
  pages     = {411--416},
  year      = {1971},
  url       = {https://ijcai.org/proceedings/1971/42},
}