@inproceedings{ijcai2009p222,
  title     = {Spatio-Temporal Event Detection Using Dynamic Conditional Random Fields},
  author    = {Yin, Jie and Hu, Derek Hao and Yang, Qiang},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1321--1325},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/222},
}