@InProceedings{Hashimoto06,
  author = 	 {Kosuke Hashimoto and Kiyoko Flora Aoki-Kinoshita and Nobuhisa Ueda and Minoru Kanehisa and Hiroshi Mamitsuka},
  title = 	 {A New Efficient Probabilistic Model for Mining Labeled Ordered Trees},
  booktitle = {Proceedings of the Twelfth ACM SIGKDD International Conference On Knowledge Discovery and Data Mining (KDD 2006)}
  year      = {2006},
  publisher = {ACM Press},
  location  = {Philadelphia, PA, USA},
  address   = {New York, NY, USA},
  pages = 	 {177--186}
}