%0 Journal Article %A Aldrovandi, Ettore %A Ramachandran, Niranjan %T Cup products, the Heisenberg group, and codimension two algebraic cycles %J Documenta mathematica %D 2016 %P 1313-1344 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2016__21__a9/ %G en %F DOCMA_2016__21__a9