Alexander Schmidt-Richberg Jan Ehrhardt René Werner Heinz Handels Slipping Objects in Image Registration: Improved Motion Field Estimation with Direction-Dependent Regularization. 755-762 2009 MICCAI (1) http://dx.doi.org/10.1007/978-3-642-04268-3_93 conf/miccai/2009-1 db/conf/miccai/miccai2009-1.html#Schmidt-RichbergEWH09