@INPROCEEDINGS{2007-BVM-JM-rigidity,
  author = {J. Modersitzki},
  title = {Image Registration with Local Rigidity Constraints},
  booktitle = {Bildverarbeitung f\"ur die Medizin},
  year = {2007},
  editor = {A Horsch, TM Deserno, H Handels, HP Meinzer, and T Tolxdoff},
  pages = {444--448},
  publisher = {Springer},
}