@inproceedings{matrixmanifoldoptimizationforgaussian,
  title = {Matrix Manifold Optimization for Gaussian Mixtures},
  author = {Reshad Hosseini and Suvrit Sra},
  year = {2015},
  booktitle = {NeurIPS 2015 12},
  url = {http://papers.nips.cc/paper/5812-matrix-manifold-optimization-for-gaussian-mixtures},
}