@article{spectralclusteringbyellipsoidandits,
  title = {Spectral Clustering by Ellipsoid and Its Connection to Separable Nonnegative Matrix Factorization},
  author = {Tomohiko Mizutani},
  year = {2015},
  eprint = {1503.01531},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1503.01531v1},
}