Dytman, S. A.Richichi, S. J.Savinov, V.Severini, H.Skubic, P.2004-12-032004-12-0320012001http://hdl.handle.net/2003/120010.17877/DE290R-11021enThe American Physical SocietyPhysical Review Letters530Search for the Decay Upsilon(1S) --> gammaeta[prime]10.1103/PhysRevLett.87.141801article (journal)