Astaburuaga, M.A. et al. 2025. Estabilidad espectral y resonancias para perturbaciones de rango finito y singulares: Spectral stability and resonances for finite rank and singular perturbations. CUBO, A Mathematical Journal. (Oct. 2025), 505–522. DOI:https://doi.org/10.56754/0719-0646.2702.505.