%0 Journal Article
%A Barr, Michael
%A Wells, Charles
%T On the Limitations of Sketches
%J Canadian mathematical bulletin
%D 1992
%P 287-294
%V 35
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-040-7/
%R 10.4153/CMB-1992-040-7
%F 10_4153_CMB_1992_040_7