TY  - JOUR
AU  - Ana Kozomara
TI  - Discrete Plane Symmetry Groups
JO  - Visual Mathematics
PY  - 1999
VL  - 1
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VM_1999_1_3_a5/
ID  - VM_1999_1_3_a5
ER  -