European Transport Research Review
European Transport Research Review > 2011 > 3 > 3 > 113-127
European Transport Research Review > 2011 > 3 > 3 > 149-159
European Transport Research Review > 2011 > 3 > 3 > 139-148
European Transport Research Review > 2011 > 3 > 3 > 161-166
European Transport Research Review > 2011 > 3 > 3 > 129-137