@InProceedings{Mamitsuka03-1,
  author = 	 {Hiroshi Mamitsuka},
  title = 	 {Hierarchical Latent Knowledge Analysis for Co-occurrence Data},
booktitle = {Proceedings of the Twentieth International Conference
	     on Machine Learning (ICML 2003)},
  year      = {2003},
  publisher = {AAAI Press},
  location  = {Washington DC, USA},
  address   = {Menlo Park, CA, USA},
  pages = 	 {504--511}
}