@article{semidefiniteprogrammingbased,
  title = {Semidefinite Programming Based Preconditioning for More Robust Near-Separable Nonnegative Matrix Factorization},
  author = {Nicolas Gillis and Stephen A. Vavasis},
  year = {2013},
  eprint = {1310.2273},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1310.2273v2},
}