Correction to "On a functional equation arising from hyperbolic geometry", Volume 21 (1980), 113-116.
Die Interpretation der Zentralkollineation in der hyperbollischen Ebene
Die Polaritäten, die einen Torus in sich überführen.
Discontinuous groups in some metric and nonmetric spaces
Distance formulas in complex hyperbolic space.
Divisible tilings in the hyperbolic plane.
Eine extremale Verteilung von Grosskreisen.
Eine Klasse von hyperbolischen Raumgruppen
Einige Bemerkungen zur Algebra der Polyeder in nicht-euklidischen Räumen.
Elementarer Zugang zur hyperbolischen Geometrie.
Elementary formulas for a hyperbolic tetrahedron.
Extremal problems for conditioned brownian motion and the hyperbolic metric
This paper investigates isoperimetric-type inequalities for conditioned Brownian motion and their generalizations in terms of the hyperbolic metric. In particular, a generalization of an inequality of P. Griffin, T. McConnell and G. Verchota, concerning extremals for the lifetime of conditioned Brownian motion in simply connected domains, is proved. The corresponding lower bound inequality is formulated in various equivalent forms and a special case of these is proved.
Gemeinsame Eigenschaften der zentralen, normalen, parallelen und überparallelen Projektionen im dreidimensionalen hyperbolischen Raum
Geometrische Krystallographie [Book]
Grassmann spaces over hyperbolic and quasi hyperbolic spaces.
Harmonic analysis and Radon transforms on pencils of geodesics.
Harmonic Analysis for Vector Fields on Hyperbolic Spaces.
h-konvexe Kurven in der hyperbolischen Ebene.
Horoball packings for the Lambert-cube tilings in the hyperbolic 3-space.
Hyperbolic 4-manifolds and conformally flat 3-manifolds