The 12 Cellists - DocumentaryChristoph Igelbrink, The 12 cellists of the Berliner Philharmonic, Rachel Helleur, David Riniker, Richard Duven, Martin Löhr, Solene Kermarrec, Nikolaus Römisch, Olaf Maninger, Martin Menking, Stephan Koncz, Dietmar Schwalke, Ludwig Quandt & Knut Weber