Mobile City Explorer: An innovative GPS and Camera Phone Based Travel Assistant for City Tourists. - Siegfried Wiesenhofer; Helmut Feiertag; Markus Ray; Lucas Paletta; Patrick Morris Luley; Alexander Almer; Mathias Schardt; Josef Ringert; Paul Beyer (Location Based Services and TeleCartography, 2007)

Estimating Pedestrian Movement Characteristics for Crowd Control at Public Transport Facilities. - Stefan Seer; Dietmar Bauer; Norbert Brändle; Markus Ray (ITSC, 2008)

On extracting commuter information from GPS motion data. - Dietmar Bauer; Markus Ray; Norbert Brändle; Helmut Schrom-Feiertag (MobiQuitous, 2008)

Pedestrian Behaviour Monitoring: Methods and Experiences. - Alexandra Millonig; Norbert Brändle; Markus Ray; Dietmar Bauer; Stefan van der Spek (BMI Book, 2009)