X-Ray Diffraction and X-Ray Absorption Spectrocopic Analyses for the Ruthenium Perovskites J.-H. Choy, S.-H. Hwang, G. Demazeau et D.-Y. Jung J. Phys. IV France, 7 C2 (1997) C2-763-C2-764 DOI: 10.1051/jp4:1997230