%0 Journal Article
%A J. PERSSON
%T New Proofs and Generalizations of Two Theorems by Lednev for Goursat Problems.
%J Mathematische Annalen
%D 1968
%P 184-208
%V 178
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1968__178_161744/
%F MAN_1968__178_161744