Identification of different Cu2+ sites in titania supported copper systems by EPR spectroscopy C. Pruvost, D. Courcot, E. Abi Aad, E. A. Zhilinskaya and A. Aboukaïs J. Chim. Phys., 96 9-10 (1999) 1527-1535 DOI: 10.1051/jcp:1999229