@article{ELA_2011__22__a42,
     author = {Soto, Ricardo L. and Rojo, Oscar and Manzaneda, Cristina B.},
     title = {On nonnegative realization of partitioned spectra},
     journal = {The electronic journal of linear algebra},
     pages = {557--572},
     publisher = {mathdoc},
     volume = {22},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2011__22__a42/}
}