@inproceedings{ijcai2007p432,
  title     = {Detect and Track Latent Factors with Online Nonnegative Matrix Factorization},
  author    = {Cao, Bin and Shen, Dou and Sun, Jian-Tao and Wang, Xuanhui and Yang, Qiang and Chen, Zheng},
  booktitle = {Proceedings of the Twentieth International Joint Conference on
               Artificial Intelligence, {IJCAI-07}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ramon López de Mántaras},
  pages     = {2689--2693},
  year      = {2007},
  url       = {https://ijcai.org/proceedings/2007/432},
}