Ferran Hurtado Marc Noy Pedro A. Ramos Carlos Seara Separating objects in the plane with wedges and strips. 1998 conf/cccg/1998 CCCG http://cgm.cs.mcgill.ca/cccg98/proceedings/cccg98-hurtado-separating.ps.gz db/conf/cccg/cccg1998.html#HurtadoNRS98