@misc{W2017964195,
  author = {Daniel A. Lidar and Isaac L. Chuang and K. Birgitta Whaley},
  title = {Decoherence-Free Subspaces for Quantum Computation},
  year = {1998},
  howpublished = {Physical Review Letters},
  doi = {https://doi.org/10.1103/physrevlett.81.2594}
}