@article{dimensionalityreductionofcollectivemotio,
  title = {Dimensionality Reduction of Collective Motion by Principal Manifolds},
  author = {Kelum Gajamannage and Sachit Butail and Maurizio Porfiri and Erik M. Bollt},
  year = {2015},
  eprint = {1508.03332},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1508.03332v1},
}