2026 · European Road Transport Telematics Implementation Co-Ordination, Willenbrock, Ralf, et al. · Zenodo (CERN European Organization for Nuclear Research)
2009 · Ralf Willenbrock, Marc Andre Funk, et al. · 16th ITS World Congress and Exhibition on Intelligent Transport Systems and ServicesITS AmericaERTICOITS Japan
2008 · Ralf Willenbrock, Marc-Andre Funk · 15th World Congress on Intelligent Transport Systems and ITS America's 2008 Annual MeetingITS AmericaERTICOITS JapanTransCore
2007 · Ralf Willenbrock, Friederike Steiner, et al. · PROCEEDINGS OF THE 14TH WORLD CONGRESS ON INTELLIGENT TRANSPORT SYSTEMS (ITS), HELD BEIJING, OCTOBER 2007