@article{GDZPPN002416565, title = {The Spectral Radius Formula in Quotient Algebras.}, journal = {Mathematische Zeitschrift}, volume = {142}, year = {1975}, pages = {157-162}, zbl = {0299.46046}, url = {http://dml.mathdoc.fr/item/GDZPPN002416565} }
Smyth, M.R.F.; West, T.T. The Spectral Radius Formula in Quotient Algebras.. Mathematische Zeitschrift, Tome 142 (1975) pp. 157-162. http://gdmltest.u-ga.fr/item/GDZPPN002416565/