Diffusion in phthalocyanine thin film layers: study by AES, EELS, EPES and electrical measurements M. Gamoudi, O. El Beqqali, M. Benkaddour, M. Al Sadoun, G. Guillaud, F. Miloua, B. Khelifa, L. El Ourzaz and C. Jardin J. Phys. III France, 1 12 (1991) 1993-2000 DOI: 10.1051/jp3:1991246