1. Advances in ultrahigh vacuum technology;Alpert,1959
2. Miniaturized thin film thermal vacuum sensor;Alvesteffer;J. Vac. Sci. Technol.,1995
3. Stable and reproducible Bayard-Alpert ionization gauge;Arnold;J. Vac. Sci. Technol.,1994
4. Über eine neue Molekularpumpe;Becker,1959
5. Thermopile vacuum gauges having transient temperature compensation and direct reading over extended ranges;Benson,1957