TY  - JOUR
AU  - Micha Sharir
AU  - D. Leven
TI  - On the Number of Critical Free Contacts of a Convex Polygonal Object Moving in Two-Dimensional Polygonal Space.
JO  - Discrete & computational geometry
PY  - 1987
SP  - 255
EP  - 270
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DCG_1987__2_131022/
ID  - DCG_1987__2_131022
ER  -