- Sarah Carnochan Naqvi; Judith J. McDonald
*The combinatorial structure of eventually nonnegative matrices,*

Electron. J. Linear Algebra 9 (2002), 255-269. - Ricardo L. Soto; Oscar Rojo; Julio Moro; Alberto Borobia
*Symmetric nonnegative realization of spectra,*

Electron. J. Linear Algebra 16 (2007), 1-18.