A purely combinatorial proof of the Hadwiger Debrunner conjecture.
Economical Coverings of Sets of Lattice Points.
Bounding the Piercing Number.
Covering a Square by Small Perimeter Rectangles.
Disjoint Edges in Geometric Graphs.
Uniform Dilations.
On-Line Steiner Trees in the Euclidean Plane.
The Maximum Size of a Convex Polygon in a Restricted Set of Points in the Plane.
Cutting Disjoint Disks by Straight Lines.
On Short Edges in Straight-Edge Triangulations.
Can Visibility Graphs Be Represented Compactly?.
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