NQR STUDY OF COPPER IN REBa2Cu3O7-y Y. Kohori, H. Shibai, Y. Oda, Y. Kitaoka, T. Kohara et K. Asayama J. Phys. Colloques, 49 C8 (1988) C8-2237-C8-2238 DOI: 10.1051/jphyscol:198881002