%0 Journal Article
%A Raphael M. Robinson
%T Undecidable Tiling Problems in the Hyperbolic Plane.
%J Inventiones mathematicae
%D 1978
%P 259-264
%V 44
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1978__44_142530/
%F IM_1978__44_142530