%0 Journal Article
%A Raphael M. Robinson
%T Undecidability and Nonperiodicity for Tilings of the Plane.
%J Inventiones mathematicae
%D 1971
%P 177-209
%V 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1971__12_142073/
%F IM_1971__12_142073