@misc{indiciae7d47c4a19658,
  title = {Information-preserving structures: A general framework for quantum zero-error information},
  author = {Blume-Kohout, Robin and Ng, Hui Khoon and Poulin, David and Viola, Lorenza},
  year = {2010},
  doi = {10.1103/physreva.82.062306},
  url = {https://www.osti.gov/biblio/21528835},
  note = {Source identifier: 21528835}
}