@article{Liu11pami,
  author    = {Yu-Shen Liu and Karthik Ramani and Min Liu},
  title     = {Computing the inner distances of volumetric models for articulated shape description with a visibility graph},
  journal   = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
  volume    = {23},
  number    = {12},
  pages     = {2538--2544},
  year      = {2011},
}