Automatic passenger counting systems (APCS) : recommendations for the application of APCSs within public transport and regional rail transport, version 2.1 / VDV, die Verkehrsunternehmen ; list of authors Dr. Silvia Köhler, BVG, Berlin, Stephan Bobinger, MVG, Munich, Ronny Branick, DB Vertrieb GmbH, Berlin, Bernd-Michael Cerfontaine, VVS, Stuttgart, Sven Krogull, MDV, Leipzig, Andreas Luther, DB Vertrieb GmbH, Berlin, Dr. Manfred Ritschel, TCAC, Dresden, Michael Schulze, MVV, Munich, Manfred Starck, HVV, Hamburg, Winfried Bruns, VDV, Cologne ; preparation of version 2.1 Dr. Manfred Ritschel, TCAC, Dresden, Dr. Silvia Köhler, BVG, Berlin, Ronny Branick, DB Vertrieb GmbH, Berlin, Prof. Brunner, University of Göttingen, David Ellenberger, University of Göttingen, Andreas Luther, DB Vertrieb GmbH, Berlin, Michael Siebert, Interautomation, Berlin, Winfried Bruns, VDV, Cologne
