@article{GDZPPN002437074,
title = {When is an Abelian Surface Isomorphic or Isogeneous to a Product of Elliptic Curves?},
journal = {Mathematische Zeitschrift},
volume = {205},
year = {1990},
pages = {293-300},
zbl = {0712.14028},
url = {http://dml.mathdoc.fr/item/GDZPPN002437074}
}
Ruppert, Wolfgang M. When is an Abelian Surface Isomorphic or Isogeneous to a Product of Elliptic Curves?. Mathematische Zeitschrift, Tome 205 (1990) pp. 293-300. http://gdmltest.u-ga.fr/item/GDZPPN002437074/