%0 Journal Article %A Andreas Thom %T Low degree bounded cohomology and $L^2$-invariants for negatively curved groups %J Groups, geometry, and dynamics %D 2009 %P 343-358 %V 3 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/60/ %R 10.4171/ggd/60 %F 10_4171_ggd_60