Achilleas Anagnostopoulos Aristodemos Pnevmatikakis A realtime mixed reality system for seamless interaction between real and virtual objects. 199-204 2008 DIMEA http://doi.acm.org/10.1145/1413634.1413673 conf/dimea/2008 db/conf/dimea/dimea2008.html#AnagnostopoulosP08