2007 · Gunnar D. Jenssen, C A Bjoerkli, et al. · PROCEEDINGS OF THE 14TH WORLD CONGRESS ON INTELLIGENT TRANSPORT SYSTEMS (ITS), HELD BEIJING, OCTOBER 2007 · 6
2001 · J Rodseth, B Asmundvaag, et al. · 8th World Congress on Intelligent Transport SystemsITS America, ITS Australia, ERTICO (Intelligent Transport Systems and Services - Europe) · 6