@misc{indiciaef76162444b6b,
  title = {Presence within a mixed reality environment.},
  author = {Paul van Schaik and Triece Turnbull and Anna van Wersch and Sarah Drummond},
  year = {2004},
  doi = {10.1089/cpb.2004.7.540},
  url = {https://pubmed.ncbi.nlm.nih.gov/15667049/},
  note = {Source identifier: 15667049}
}