@INPROCEEDINGS{ahmadi2006workflow,
  author = {Seyed-Ahmad Ahmadi and Tobias Sielhorst and Ralf Stauder and Martin
	Horn and Hubertus Feussner and Nassir Navab},
  title = {Recovery of surgical workflow without explicit models},
  booktitle = {MICCAI '06},
  year = {2006},
  pages = {420-428}
}