%0 Journal Article %A Risto Atanasov %T Geometric two-dimensional duality groups %J Groups, geometry, and dynamics %D 2014 %P 69-95 %V 8 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/ggd/217/ %R 10.4171/ggd/217 %F 10_4171_ggd_217