Cables for electrical power installations of urban DC rail systems and trolleybus systems / VDV, die Verkehrsunternehmen ; Overall revision Committee on Electrical Power Installations ; list of authors Andreas Boldt, Berlin, Robert Born, Berlin, Wieslaw Galecki, Cologne, Dietmar Jäger, Dresden, Nico Ludwig, Leipzig, Klaus Müller, Erlangen, Maximilian Neigert, Munich, Ralf Neumann, Berlin, Jens Perbandt, Hamburg, Jürgen Schneider, Chemnitz, Udo Stahlberg, Cologne, Walter Winkelbauer, Cologne