The Coexistence of Elations and Homologies.
On Projective Planes of Lenz-Barlotti Class I6.
On the Group of Projectivities on a Line in a Finite Prjective Plane.
A Geometric Characterization of Generalized Moulton Planes.
On Planes of Lenz-Barlotti Class I 6 and Planes of Lenz Class III.
Strongly Ovoidal Möbius Planes.
Strongly Ovoidal Möbius Planes II.
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