@article{hkws06,
      author="Paul Holleis and Matthias Kranz and Anneke Winter and Albrecht Schmidt",
      title="{P}laying with the {R}eal {W}orld",
      journal="Journal of Virtual Reality and Broadcasting",
      year="2006",
      volume="3",
      number="1",
      month=apr,
      note="{\tt urn:nbn:de:0009-6-2948}, ISSN 1860-2037"
}