Nonnegative realization of complex spectra. Soto, Ricardo L.; Salas, Mario; Manzaneda, Cristina — 2010 ELA. The Electronic Journal of Linear Algebra [electronic only]
On nonnegative realization of partitioned spectra. Soto, Ricardo L.; Rojo, Oscar; Manzaneda, Cristina B. — 2011 ELA. The Electronic Journal of Linear Algebra [electronic only]