@INPROCEEDINGS{blum2008miccai, author = {Tobias Blum and Nicolas Padoy and Hubertus Feussner and Nassir Navab}, title = {Modeling and Online Recognition of Surgical Phases using Hidden Markov Models}, booktitle = {International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI)}, year = {2008}, address = {New York, USA}, month = {September}, pages = {627-635} }