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@article{MZ_1982__180_173187, author = {Tosio Kato}, title = {Superconvexity of the {Spectral} {Radius,} and {Convexity} of the {Spectral} {Bound} and the {Type.}}, journal = {Mathematische Zeitschrift}, pages = {265--274}, publisher = {mathdoc}, volume = {180}, year = {1982}, zbl = {0471.46012}, url = {http://geodesic.mathdoc.fr/item/MZ_1982__180_173187/} }
Tosio Kato. Superconvexity of the Spectral Radius, and Convexity of the Spectral Bound and the Type.. Mathematische Zeitschrift, Tome 180 (1982), pp. 265-274. http://geodesic.mathdoc.fr/item/MZ_1982__180_173187/