%0 Journal Article
%A Paulus Gerdes
%T Mwani Colour Inversion, Symmetry and Cycle Matrices
%J Visual Mathematics
%D 2007
%V 9
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VM_2007_9_3_a0/
%F VM_2007_9_3_a0