In Situ X-Ray Absorption Studies of the Electrochemical Reduction of Hydroxocobalamin M. Giorgett, I. Ascone, M. Berrettoni, S. Zamponi et R. Marassi J. Phys. IV France, 7 C2 (1997) C2-619-C2-620 DOI: 10.1051/jp4/1997116