Arms, D. A.Graber, T. J.Macrander, A. T.Schwoerer-Böhning, M.Simmons, R. O.2004-12-032004-12-0320012001http://hdl.handle.net/2003/127710.17877/DE290R-11080enThe American Physical SocietyPhysical Review Letters530Exciton Dispersion and Electronic Excitations in hcp 4He10.1103/PhysRevLett.87.156402article (journal)