The EFG Analysis of La2CuO4 and YBa2Cu3O7 Based Superconductors Ivan Kupčić, Slaven Barišić et Eduard Tutiš J. Phys. I France, 6 12 (1996) 2291-2297 Accepté le : 3 septembre 1996 DOI: 10.1051/jp1:1996218