@InProceedings{hastreiter97c,
  author =       {Hastreiter, P. and Ertl, T.},
  title =        {{Retrospective Registration of MRA and DSA based on Mutual Information}},
  booktitle =    {1st International Congress on Computer Integrated Surgery},
  editor =       {Society for the Advancement of Neurosurgical Science and Resea
rch - CIS '97},
  series =       {Computer Aided Surgery},
  year =         1997,
  organization = {International Society for Computer Aided Surgery }
}