@inproceedings{ijcai1971p44,
  title     = {On the Classification of Patterns by the Karhunen-Loeve Orthogonal System Without Supervisor},
  author    = {Tomita, Shingo and Noguchi, Shoichi},
  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     = {424--427},
  year      = {1971},
  url       = {https://ijcai.org/proceedings/1971/44},
}