TY  - JOUR
AU  - Paulus Gerdes
TI  - Mwani Colour Inversion, Symmetry and Cycle Matrices
JO  - Visual Mathematics
PY  - 2007
VL  - 9
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VM_2007_9_3_a0/
ID  - VM_2007_9_3_a0
ER  -