Dupin'sche Hyperflächen in E4.
Examples of infinite dimensional isoparametric submanifolds.
Constant Curvature 2-spheres in the 4-sphere.
Discrete isothermic surfaces.
On the Geometry of Affine Immersions.
A canonical metric for Möbius structures and its applications.
Quaternionic analysis on Riemann surfaces and differential geometry.
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