@article{nonasymptoticanalysisoftangentspace,
  title = {Non-Asymptotic Analysis of Tangent Space Perturbation},
  author = {Daniel N. Kaslovsky and Francois G. Meyer},
  year = {2011},
  eprint = {1111.4601},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1111.4601v4},
}