@article{GDZPPN002211505,
title = {Algebraic cycles in families of abelian varieties over Hilbert-Blumenthal surfaces.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {450},
year = {1994},
pages = {149-172},
zbl = {0805.14024},
url = {http://dml.mathdoc.fr/item/GDZPPN002211505}
}
Gordon, B. Brent. Algebraic cycles in families of abelian varieties over Hilbert-Blumenthal surfaces.. Journal für die reine und angewandte Mathematik, Tome 450 (1994) pp. 149-172. http://gdmltest.u-ga.fr/item/GDZPPN002211505/