Carrillo-Cabrera, W.Grosche, F. M.Langhammer, C.Paschen, S.Yuan, H. Q.2004-12-032004-12-0320012001http://hdl.handle.net/2003/186410.17877/DE290R-4638enThe American Physical SocietyPhysical Review Letters530Superconductivity in the Filled Cage Compounds Ba6Ge25 and Ba4Na2Ge2510.1103/PhysRevLett.87.247003article (journal)