Chris Christou Heinrich H. Bülthoff Using Realistic Virtual Environments in the Study of Spatial Encoding. 317-332 2000 conf/spatialCognition/2000 Spatial Cognition http://link.springer.de/link/service/series/0558/bibs/1849/18490317.htm db/conf/spatialCognition/spatialCognition2000.html#ChristouB00