@ARTICLE{HeRuWa12,
  author = {Heeren, Behrend and Rumpf, Martin and Wardetzky, Max and Wirth, Benedikt},
  title = {Time-Discrete Geodesics in the Space of Shells},
  journal = {Comput. Graph. Forum},
  year = {2012},
  volume = {31},
  pages = {1755--1764},
  number = {5},
  doi = {10.1111/j.1467-8659.2012.03180.x},
  pdf = {http://numod.ins.uni-bonn.de/research/papers/public/HeRuWa12.pdf},
  fjournal = {Computer Graphics Forum}
}