@misc{indiciae7c7177956b71,
  title = {Entanglement constrained by superselection rules.},
  author = {Stephen D Bartlett and H M Wiseman},
  year = {2003},
  doi = {10.1103/physrevlett.91.097903},
  url = {https://pubmed.ncbi.nlm.nih.gov/14525211/},
  note = {Source identifier: 14525211}
}