@misc{W2060887031,
  author = {Charles H. Bennett and David P. DiVincenzo and John A. Smolin and William K. Wootters},
  title = {Mixed-state entanglement and quantum error correction},
  year = {1996},
  howpublished = {Physical Review A},
  doi = {https://doi.org/10.1103/physreva.54.3824}
}