%0 Journal Article %A Guyan Robertson %T Harmonic cochains and K-theory for $\tilde{A}_2$-groups %J Groups, geometry, and dynamics %D 2014 %P 245-255 %V 8 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/224/ %R 10.4171/ggd/224 %F 10_4171_ggd_224