@article{twolayerclusteringbasedsparsifying,
  title = {Two-layer clustering-based sparsifying transform learning for low-dose CT reconstruction},
  author = {Xikai Yang and Yong Long and Saiprasad Ravishankar},
  year = {2020},
  eprint = {2011.00428},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2011.00428v1},
}