TY  - JOUR
AU  - J. PERSSON
TI  - New Proofs and Generalizations of Two Theorems by Lednev for Goursat Problems.
JO  - Mathematische Annalen
PY  - 1968
SP  - 184
EP  - 208
VL  - 178
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1968__178_161744/
ID  - MAN_1968__178_161744
ER  -