- John Maroulas
*Further results on the Craig-Sakamoto equation,*

Electron. J. Linear Algebra 17 (2008), 445-457. - Nikolaos Papathanasiou; Panayiotis Psarrakos
*Normal matrix polynomials with nonsingular leading coefficients,*

Electron. J. Linear Algebra 17 (2008), 458-472.