@article{ELA_2009__18__a21,
     author = {Ccapa, Javier and Soto, Ricardo L.},
     title = {On spectra perturbation and elementary divisors of positive matrices},
     journal = {The electronic journal of linear algebra},
     pages = {462--481},
     publisher = {mathdoc},
     volume = {18},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__18__a21/}
}