1. Über die Berührung fester elastischer Körper;Hertz,1895
2. Zur Theorie der rollenden Reibung
3. On the reciprocal pressure between two elastic bodies;De Pater,1962
4. On the action of a locomotive driving wheel;Carter,1926
5. On the rolling contact of two elastic bodies in the presence of dry friction;Kalker;Dissertation,1967