%0 Journal Article
%A N. Aronszajn
%A R. Brown
%T Finite-dimensional perturbations of spectral problems and variational approximation methods for eigenvalue problems. Part I. Finite-dimensional perturbations
%J Studia Mathematica
%D 1970
%P 1-76
%V 36
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm-36-1-1-76/
%R 10.4064/sm-36-1-1-76
%G en
%F 10_4064_sm_36_1_1_76