TY  - JOUR
AU  - Wolfgang M. Ruppert
TI  - When is an Abelian Surface Isomorphic or Isogeneous to a Product of Elliptic Curves?
JO  - Mathematische Zeitschrift
PY  - 1990
SP  - 293
EP  - 300
VL  - 203
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174128/
ID  - MZ_1990__203_3_174128
ER  -