Elaboration and characterization of europium doped ceria solid solutions L. Aneflous, S. Villain, J.R. Gavarri, J. Musso, H. Benyaich, A. Benlhachemi and A. Marrouche J. Phys. IV France, 123 (2005) 35-39 DOI: 10.1051/jp4:2005123005