%0 Journal Article %A Tim Austin %A Assaf Naor %A Romain Tessera %T Sharp quantitative nonembeddability of the Heisenberg group into superreflexive Banach spaces %J Groups, geometry, and dynamics %D 2013 %P 497-522 %V 7 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/193/ %R 10.4171/ggd/193 %F 10_4171_ggd_193