On the estimation of the q -numerical range of monic matrix polynomials. Psarrakos, Panayiotis J. — 2004 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
On the m -th roots of a complex matrix. Psarrakos, Panayiotis J. — 2002 ELA. The Electronic Journal of Linear Algebra [electronic only]
Separable characteristic polynomials of pencils and property L . Maroulas, John; Psarrakos, Panayiotis J.; Tsatsomeros, Michael J. — 2000 ELA. The Electronic Journal of Linear Algebra [electronic only]