2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16464I study the quasiparticle level correlations in a grain of a weakly disordered d-wave superconductor, and show that, in a wide intermediate energy range, they are characterized by a novel type of universal behavior.Strongly Correlated ElectronsMesoscale and Nanoscale Physicstext