%0 Journal Article
%A B. M. Levitan
%T On the determination of the Sturm--Liouville operator from one and two spectra
%J Izvestiya. Mathematics 
%D 1978
%P 179-193
%V 12
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1978_12_1_a6/
%G en
%F IM2_1978_12_1_a6