1. Ebene Kinematik;Blaschke;Math. Einzelschriften,1956
2. Theoretical Kinematics;Bottema,1979
3. Topology and Geometry;Bredon,1993
4. Rationale Bézier-Kurven und Bézier-Flächenstücke auf Quadriken;Dietz,1995
5. An algebraic approach to curves and surfaces on the sphere and on other quadrics;Dietz;Computer Aided Geometric Design,1993