@inproceedings{DBLP:conf/spatialCognition/Ruddle00,
  author    = {Roy A. Ruddle},
  title     = {Navigating Overlapping Virtual Worlds: Arriving in One Place
               and Finding that You're Somewhere Else},
  booktitle = {Spatial Cognition},
  year      = {2000},
  pages     = {333-347},
  ee        = {http://dx.doi.org/10.1007/3-540-45460-8_24},
  crossref  = {DBLP:conf/spatialCognition/2000},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/spatialCognition/2000,
  editor    = {Christian Freksa and
               Wilfried Brauer and
               Christopher Habel and
               Karl Friedrich Wender},
  title     = {Spatial Cognition II, Integrating Abstract Theories, Empirical
               Studies, Formal Methods, and Practical Applications},
  booktitle = {Spatial Cognition},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {1849},
  year      = {2000},
  isbn      = {3-540-67584-1},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}