Iraklis Varlamis Michalis Vazirgiannis Iosif Lazaridis M. Papageorgiou Themis Panayiotopoulos Distributed Virtual Reality Authoring Interfaces for the WWW: The VR-Shop Case. 5-30 2004 22 Multimedia Tools Appl. 1 http://dx.doi.org/10.1023/B:MTAP.0000008657.07799.b0 db/journals/mta/mta22.html#VarlamisVLPP04