Coherence transition in granular YBa2Cu3O7-δ, YBa2Cu2.95Zn0.05O7-δ, and YBa1.75Sr0.25Cu3O7-δ superconductorsR. Menegotto Costa, L. Mendonça Ferreira, V. N. Vieira, P. Pureur and J. SchafEur. Phys. J. B, 58 2 (2007) 107-113DOI: https://doi.org/10.1140/epjb/e2007-00207-3