@inproceedings{extendedgrassmannkernelsforsubspacebased,
  title = {Extended Grassmann Kernels for Subspace-Based Learning},
  author = {Jihun Hamm and Daniel D. Lee},
  year = {2008},
  booktitle = {NeurIPS 2008 12},
  url = {http://papers.nips.cc/paper/3433-extended-grassmann-kernels-for-subspace-based-learning},
}