@INPROCEEDINGS{zikic2011precondition,
  author = {Darko Zikic and Maximilian Baust and Ali Kamen and Nassir Navab},
  title = {A General Preconditioning Scheme for Difference Measures in Deformable Registration},
  booktitle = {Proc. IEEE International Conference on Computer Vision (ICCV)},
  year = {2011}
}