TY  - JOUR
AU  - J.J. Schäffer
TI  - Linear Differential Equations and Functional Analysis. VI.
JO  - Mathematische Annalen
PY  - 1962
SP  - 354
EP  - 400
VL  - 145
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1962__145_160915/
ID  - MAN_1962__145_160915
ER  -