Cubic extensions of flag-transitive planes. I: Even order.
Curvature and Shape
Curvature in synthetic differential geometry of groupoids.
Curvature integral and Lipschitz parametrization in 1-regular metric spaces.
Curves and lattices of points in the Minkowski plane
Curves of minimal order.
Cutting circles and the Morley theorem.
Cyclic quadrangles from squares.
Cyclides of order 3 in Galileian space . (Zykliden 3. Ordnung des galileischen Raumes .)
Cyclides of rotation of the Galileian space . (Drehzykliden des galileischen Raumes .)
Cyklografie [Book]
Cylinder and horoball packing in hyperbolic space.