%0 Journal Article
%A Hansen, Anders
%T On the Solvability Complexity Index, the 𝑛-pseudospectrum and approximations of spectra of operators
%J Journal of the American Mathematical Society
%D 2011
%P 81-124
%V 24
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-2010-00676-5/
%R 10.1090/S0894-0347-2010-00676-5
%F 10_1090_S0894_0347_2010_00676_5