Classen, J.Enss, C.Hunklinger, S.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1866810.17877/DE290R-6403enThe American Physical SocietyPhysical Review Letters530Comment on "Low Temperature Acoustic Properties of Amorphous Silica and the Tunneling Model"10.1103/PhysRevLett.86.2480article (journal)