1. Lubrication of gear theeth;Martin;Engineering,1916
2. Uber geschmierte arbeitsräder;Gümbel;Z. Ges. Turbinenwesen,1916
3. Investigation of the contact of machine components;Grubin,1949
4. Fundamental conclusions from the contact hydrodynamic theory of lubrication;Petrusevitch;Izv. Akad. Naud. SSSR (OTN),1951
5. Elasto-hydrodynamic lubrication: the fundamentals of roller and gear lubrication;Dowson,1966