%0 Journal Article %A Thomas Geisser %T Duality for $\Bbb Z$-constructible sheaves on curves over finite fields %J Documenta mathematica %D 2012 %P 989-1002 %V 17 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/387/ %R 10.4171/dm/387 %F 10_4171_dm_387