Stanislav L. Stoev Matthias Feurer Michael Ruckaberle Wolfgang Straßer Exploring the past: a toolset for visualization of historical events in virtual environments. 63-70 2001 conf/vrst/2001 VRST https://doi.org/10.1145/505008.505020 db/conf/vrst/vrst2001.html#StoevFRS01