@article{principalmanifoldsandgraphsinpractice,
  title = {Principal manifolds and graphs in practice: from molecular biology to dynamical systems},
  author = {A. N. Gorban and A. Zinovyev},
  year = {2010},
  eprint = {1001.1122},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1001.1122v2},
}