Derivation of Flocks of Quadratic Cones.
Die komplex-hyperbolische Ebene.
Die Unterebenen der freien symmetrischen Ebenen (II).
Die Varietät der auflösbaren Ternare der Ordnung 2
Dimensions of Hyperplane Spaces over Finite Fields.
Disegni divisibili e loro automorfismi
Disjoint unions of incidence structures and complete lattices
Distance-preserving maps in generalized polygons. I: Maps on flags.
Distance-preserving maps in generalized polygons. II: Maps on points and/or lines.
Divisible designs admitting a Suzuki group as an automorphism group
Si costruiscono, facendo uso delle rette dei piani di Lüneburg e degli ovali di Tits, due classi di disegni divisibili ipersemplici che ammettono il gruppo di Suzuki ( con ) come gruppo di automorfismi. Inoltre si studiano le strutture ottenute determinandone le orbite di .
Dual codes of projective planes of order 25.
Dual partial quadrangles embedded in .
Dualitäten mit zwei Geraden aus absoluten Punkten in projektiven Ebenen.
Efficient covering designs of the complete graph.
Eigenfunctions of the Laplace operators for buildings of type
We consider for an affine building of type Helgason's conjecture with respect to Laplace operators defined over different types of vertices. We prove that there are cases in which the conjecture fails, since there exist eigenfunctions which are not the Poisson transform of finitely additive measures at the maximal boundary of the building.
Ein "affiner" Beweis des Satzes von v. Staudt - Schleiermacher.
Eine Bemerkung über endliche Ovale ungerader Ordnung
Eine Ebene im projektiven Raum mit Homomorphismus
Eine neue Klasse endlicher Translationsebenen.
Endliche zyklische Ebenen.