1. Rodgers, T. W. et al.: SAE Meeting, Paper 720 467, 1972.
2. Behling, R. D. – Weise, E.: SAE Meeting, Paper 730 048, 1973.
3. Performance Testing of Lubricants for Automotive Engines and Transmissions;Souillard,1974
4. Eberan-Eberhorst, C. G. A. – Weise, E.: ibid., 333.