Characterizations of matrices which eigenprojections at zero are equal to a fixed perturbation. - N. Castro-González; José Ygnacio Vélez Cerrada (Appl. Math. Comput., 2004)

The weighted Drazin inverse of perturbed matrices with related support idempotents. - N. Castro-González; José Ygnacio Vélez Cerrada (Appl. Math. Comput., 2007)

Análisis de la perturbación de la inversa de Drazin de matrices, elementos en anillos y operadores acotados en espacios de Banach. - José Ygnacio Vélez Cerrada (2007)

Characterizations of a Class of Matrices and Perturbation of the Drazin Inverse. - N. Castro-González; Juan Robles; José Ygnacio Vélez Cerrada (SIAM J. Matrix Anal. Appl., 2008)

Error bounds for the perturbation of the Drazin inverse under some geometrical conditions. - José Ygnacio Vélez Cerrada; Juan Robles; N. Castro-González (Appl. Math. Comput., 2009)