@article{ellipsoidalroundingfornonnegativematrix,
  title = {Ellipsoidal Rounding for Nonnegative Matrix Factorization Under Noisy Separability},
  author = {Tomohiko Mizutani},
  year = {2013},
  eprint = {1309.5701},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1309.5701v2},
}