Ternary rings of Pappian planes
Ternary rings with zero associated to Desarguesian and Pappian planes
Ternary rings with zero associated to translation planes
The affine plane AG(2,q), q odd, has a unique one point extension.
The chromatic index of cyclic Steiner 2-designs.
The classification of generalized quadrangles with two translation points.
The classification of SPG-systems of index 2.
The classification of spreads in admitting linear groups of order . II: Even order.
The Coexistence of Elations and Homologies.
The Collineation Groups of Derived Translation Planes. II.
The cross-ratio in Hjelmslev planes
The cross-ratio in Hjelmslev planes is defined. The cross-ratio in the Hjelmslev plane is independent of the choice of a coordinate system on a line.
The cyclic -clans with .
The finite Moufang hexagons coordinatized.
The four known biplanes with k=11.
The fundamental theorem for the projective line over commutative rings. (Short Communication).
The fundamental theorem for the projective line over commutative rings.
The generating rank of the symplectic line-Grassmannian.
The geometry of in translation planes of even order .
The geometry of GL(2,q) in translation planes of even order (Corrigendum).
The hyperplanes of .