Ammerahl, U.Büchner, B.Choi, K.-Y.Grüninger, M.Kataev, V.2004-12-272004-12-2720012001http://hdl.handle.net/2003/1928810.17877/DE290R-2002enThe American Physical SocietyPhysical Review Letters530Strong Anisotropy of Superexchange in the Copper-Oxygen Chains of La14xCaxCu24O4110.1103/PhysRevLett.86.2882article (journal)