Politano A.Chiarello G.2020-12-042020-12-042009http://hdl.handle.net/20.500.12614/311enAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Collective electronic excitations in systems exhibiting quantum well statesresearch article10.1142/S0218625X09012482