@article{towardsapplyingtheopratheorytoshape,
  title = {Towards Applying the OPRA Theory to Shape Similarity},
  author = {Christopher H. Dorr and Reinhard Moratz},
  year = {2017},
  eprint = {1705.02653},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1705.02653v1},
}