@inproceedings{ijcai1971p7,
  title     = {Grid Coding: A Preprocessing Technique for Robot and Machine Vision},
  author    = {Will, Peter M. and Pennington, Keith S.},
  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     = {66--69},
  year      = {1971},
  url       = {https://ijcai.org/proceedings/1971/7},
}