Self-organized criticality effect on stability: magneto-thermal oscillations in a granular YBCO superconductorL. Legrand, I. Rosenman, R. G. Mints, G. Collin and E. JanodEurophys. Lett., 34 4 (1996) 287-292DOI: https://doi.org/10.1209/epl/i1996-00452-6