CGAL 5.6.1 - 2D Movable Separability of Sets
Bibliography
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[2]

G. T. Toussaint. Movable separability of sets. In G. T. Toussaint, editor, Computational Geometry, pages 335–375. North-Holland, Amsterdam, Netherlands, 1985.

[3]

Neal R. Wagner. The sofa problem. The American Mathematical Monthly, 83(3):188–189, 1976.