@article{GDZPPN001170716, title = {On Asymptotically Best Norms for Powers of Operators.}, journal = {Numerische Mathematik}, volume = {19}, year = {1972}, pages = {93-98}, zbl = {0232.65038}, url = {http://dml.mathdoc.fr/item/GDZPPN001170716} }
Varga, R.S.; Kammerer, W.J. On Asymptotically Best Norms for Powers of Operators.. Numerische Mathematik, Tome 19 (1972) pp. 93-98. http://gdmltest.u-ga.fr/item/GDZPPN001170716/