TY - JOUR AU - Ccapa, Javier AU - Soto, Ricardo L. TI - On spectra perturbation and elementary divisors of positive matrices JO - The electronic journal of linear algebra PY - 2009 SP - 462 EP - 481 VL - 18 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ELA_2009__18__a21/ LA - en ID - ELA_2009__18__a21 ER -