Crystal structure, magnetic susceptibility and thermopower of superconducting and non-superconducting Nd1.85Ce0.15CuO4+yI. MagelschotsN.H. Andersenet al.1992Physica C: Superconductivity and its applications
Behavior of charge-transfer absorption upon passing through the neutral-ionic phase transitionC.S. JacobsenJ.B. Torrance1982The Journal of Chemical Physics