@inproceedings{ijcai1975p89,
  title     = {The Description And Control Of Changing Pictures..},
  author    = {Pfinter, G.},
  booktitle = {Proceedings of the Fourth International Joint Conference on
               Artificial Intelligence, {IJCAI-75}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Patrick Winston and Carl Hewitt},
  pages     = {569--573},
  year      = {1975},
  note      = {A.I. Software},
  url       = {https://ijcai.org/proceedings/1975/89},
}