TY  - JOUR
AU  - Frans Oort
TI  - Which Abelian Surfaces are Products of Elliptic Curves ?
JO  - Mathematische Annalen
PY  - 1975
SP  - 35
EP  - 48
VL  - 214
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1975__214_162679/
ID  - MAN_1975__214_162679
ER  -