Effect of Li-doping on the superconducting properties of EuBa2CU3O7 by a.c. susceptibility measurements and Li N.M.R. M. Nicolas, C. Nguyen Van Huong, A. Dubon, C. Vetter et J. Conard J. Phys. III France, 3 1 (1993) 13-23 DOI: 10.1051/jp3:1993115