1. Evapor-Ion Pump;Herb;Phys. Rev.,1953
2. Sublimation and Ion Pumping in Getter-Ion Pumps;Herb;Rev. Sci. Instrum.,1964
3. Operational Procedures and Experiences with a High-Speed Ion Getter Pump;Adam,1962
4. Hall, L.D., Helmer, J.C., Jepsen, R.L., U.S. Patent No. 2,993,638, “Electrical Vacuum Pump Apparatus and Method”, field 7/24/57, awarded 7/25/61.
5. Instabilities in Crossed-Field Discharges at Low Pressures;Redhead;Vacuum,1988