%0 Journal Article
%A V. A. Marchenko
%A I. V. Ostrovskii
%T A~characterization of the spectrum of Hill's operator
%J Sbornik. Mathematics
%D 1975
%P 493-554
%V 26
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1975_26_4_a4/
%G en
%F SM_1975_26_4_a4