@inproceedings{ijcai1983p223,
  title     = {Constraints for the Estimation of Displacement Vector Fields From Image Sequences},
  author    = {Nagel, Hans-Hellmut},
  booktitle = {Proceedings of the Eighth International Joint Conference on
               Artificial Intelligence, {IJCAI-83}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Alan Bundy},
  pages     = {945--950},
  year      = {1983},
  note      = {Vision},
  url       = {https://ijcai.org/proceedings/1983/223},
}