1. Tribology tests for satellite applications: simulation of the space environment;Robbins;ESA SP 111,1975
2. Summary of lubrication problems in vacuum environment;Johnson;Report,1964
3. Problems in space simulation for lubricated systems;Jackson,1962
4. Design and lubrication of ball bearing units for flywheels;Auer,1975
5. Grease lubricated spiral groove bearings for long life systems;Muijderman,1975