See at:
CNR IRIS | ISTI Repository
| www.nosaitaca.it
| CNR IRIS
See at:
CNR IRIS | CNR IRIS
| www.eccomas.org
See at:
cmmse.usal.es | CNR IRIS
| CNR IRIS
See at:
arXiv.org e-Print Archive | SIAM Journal on Matrix Analysis and Applications
| epubs.siam.org
| CNR IRIS
| ISTI Repository
| SIAM Journal on Matrix Analysis and Applications
| doi.org
| CNR IRIS
| CNR IRIS