XAFS and Crystallographic Studies of Ni(II) Porphyrins in Single Crystals and Solution M. W. Renner, L. R. Furenlid, K. M. Barkigia et J. Fajer J. Phys. IV France, 7 C2 (1997) C2-661-C2-662 DOI: 10.1051/jp4/1997138