TY  - JOUR
AU  - D. Halperin
TI  - On the Complexity of a Single Cell in Certain Arrangements of Surfaces Related to Motion Planning.
JO  - Discrete & computational geometry
PY  - 1994
SP  - 1
EP  - 34
VL  - 11
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DCG_1994__11_3_131286/
ID  - DCG_1994__11_3_131286
ER  -