id: 50231553
dt: j
an: 50231553
au: Halperin, Dan
ti: On the complexity of a single cell in certain arrangement of surfaces
    related to motion planning
so: Discrete & Computational Geometry 11, 1-33 (1994).
py: 1994
pu: 
la: EN
cc: 
ut: 
ci: 
li: doi:10.1007/BF02573992