@article{GDZPPN002310813,
title = {Which Abelian Surfaces are Products of Elliptic Curves ?},
journal = {Mathematische Annalen},
volume = {217},
year = {1975},
pages = {35-48},
zbl = {0283.14007},
url = {http://dml.mathdoc.fr/item/GDZPPN002310813}
}
Oort, Frans. Which Abelian Surfaces are Products of Elliptic Curves ?. Mathematische Annalen, Tome 217 (1975) pp. 35-48. http://gdmltest.u-ga.fr/item/GDZPPN002310813/