Intragranular and intergranular transitions in Y-Ba-Cu-O ceramics J. Rosenblatt, A. Raboutou, P. Peyral et C. LebeauRev. Phys. Appl. (Paris), 25 1 (1990) 73-78DOI: https://doi.org/10.1051/rphysap:0199000250107300