@ARTICLE{BeLiRu09, author = {Berkels, Benjamin and Linkmann, Gina and Rumpf, Martin}, title = {An ${S}{L}(2)$ Invariant Shape Median}, journal = {Journal of Mathematical Imaging and Vision}, year = {2010}, volume = {37}, pages = {85--97}, number = {2}, doi = {10.1007/s10851-010-0194-6}, pdf = {http://numod.ins.uni-bonn.de/research/papers/public/BeLiRu09.pdf}, }