TY  - JOUR
AU  - Corinne Cerf
TI  - A Family of Impossible Figures Studied by Knot Theory
JO  - Visual Mathematics
PY  - 2002
VL  - 4
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VM_2002_4_3_a0/
ID  - VM_2002_4_3_a0
ER  -