Minkowski Circle Packings on the Sphere.
Discret. Comput. Geom., 1999
Flight in a Packing of Disks.
Discret. Comput. Geom., 1993
Remarks on 5-Neighbor Packings and Coverings with Circles.
Proceedings of the Applied Geometry And Discrete Mathematics, 1990
Packing of ellipses with continuously distributed area.
Discret. Math., 1986
Densest Packing of Translates of the Union of Two Circles.
Discret. Comput. Geom., 1986