%0 Journal Article
%A A. G. Eliseev
%T Theory of singular perturbations with a~non-smooth spectrum of the~limit operator
%J Sbornik. Mathematics
%D 1995
%P 951-966
%V 186
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1995_186_7_a2/
%G en
%F SM_1995_186_7_a2