Magnetic hysteresis of the magnetoresistence and the critical current density in polycrystalline 'YBa IND.2' 'Cu IND.3' 'O IND.7-'delta''-Ag superconductors - Mune, P; Fonseca, F C; Muccillo, R; Jardim, Renato de Figueiredo (Physica C, 2003)