@article{sparsecodinganddictionarylearningfor,
  title = {Sparse Coding and Dictionary Learning for Symmetric Positive Definite Matrices: A Kernel Approach},
  author = {Mehrtash T. Harandi and Conrad Sanderson and Richard Hartley and Brian C. Lovell},
  year = {2013},
  eprint = {1304.4344},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1304.4344v1},
}