%0 Journal Article
%A P. G. Grinevich
%A S. P. Novikov
%T Two-dimensional ``inverse scattering problem'' for negative energies and generalized-analytic functions. I. Energies below the ground state
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1988
%P 23-33
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1988_22_1_a2/
%G ru
%F FAA_1988_22_1_a2