Kappler, J. P., M. J. Besnus, E. Beaurepaire, A. Meyer, J. Sereni, and G. Nieva. "Magnetic transition in the CePd3Bx system." Journal of Magnetism and Magnetic Materials 47 (1985): 111–114.
Abstract: Susceptibility, high-field magnetisation, resistivity and heat capacity data for the CePd3Bx system are reported. The observed valence transition of Ce is the first example of a transition from an IV state system to a stable magnetic 4f1 state system, whose properties are tentatively ascribed to an aleatory cooperative state, due to the inhomogeneous character of the valence transition, rather than to a Kondo effect.