@inproceedings{spectralmethodsforlearningmultivariate,
  title = {Spectral Methods for Learning Multivariate Latent Tree Structure},
  author = {Animashree Anandkumar and Kamalika Chaudhuri and Daniel J. Hsu and Sham M. Kakade and Le Song and Tong Zhang},
  year = {2011},
  booktitle = {NeurIPS 2011 12},
  url = {http://papers.nips.cc/paper/4208-spectral-methods-for-learning-multivariate-latent-tree-structure},
}