@inproceedings{principalgeodesicanalysisforprobability,
  title = {Principal Geodesic Analysis for Probability Measures under the Optimal Transport Metric},
  author = {Vivien Seguy and Marco Cuturi},
  year = {2015},
  booktitle = {NeurIPS 2015 12},
  eprint = {1506.07944},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1506.07944v2},
}