%0 Journal Article %A Florian Ivorra %T $\ell$-adic realization of geometric triangular motives. I %J Documenta mathematica %D 2007 %P 607-671 %V 12 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/237/ %R 10.4171/dm/237 %F 10_4171_dm_237