Spectrum preserving lower triangular completions -- the nonnegative nilpotent case prefix ID Berman, Abraham; Krupnik, Mark Electron. J. Linear Algebra 2, 9-16 (1997)
Infinite products and paracontracting matrices prefix ID Beyn, W.-J.; Elsner, L. Electron. J. Linear Algebra 2, 1-8 (1997)
