1. Electrostatic cylinder lenses. II. Three element einzel lenses;Adams;J. Phys.,1972
2. Electrostatic cylinder lenses. III. Three element asymmetric voltage lenses;Adams;J. Phys.,1972
3. Hybrid computer-aided synthesis of thick electrostatic electron lenses;Ashley,1971
4. Hybrid computer-aided design of thick electrostatic electron lenses;Ashley,1972
5. High-speed, high-precision electron ray tracing;Birtles;Int. J. Electron.,1972