A family of Minkowski planes over half-ordered fields.
A family of flat Minkowski planes admitting 3-dimensional simple groups of automorphisms.
Criteria for two-dimensional circle planes.
Generalized quadrangles and projective axes of symmetry.
Virtual points and separating sets in spherical circle planes.
The Elation Group of a 4-DImensional Laguerre Plane.
Semiclassical 4-dimensional Laguerre Planes.
4-dimensional Minkowski planes with large automorphism group.
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