Electron distribution change of small nickel particles encaged in X zeolite in presence of Ce3+ ions, related to their catalytic propertiesF. Vergand, B. Iraqi, C. Bonnelle, E. Ramaroson, M.F. Guilleux, J.F. Tempere and D. DelafosseJ. Chim. Phys., 83 (1986) 619-621DOI: https://doi.org/10.1051/jcp/1986830619