1. A closed cell for electron microscopy;Abrams;J. Appl. Phys.,1944
2. The story of the European commercial electron microscopes;Agar;Adv. Imaging Electron Phys.,1996
3. An energy analyser for high-voltage electron microscopy;Considine,1969
4. Practical Electron Microscopy;Cosslett,1951
5. Electron penetration in high voltage electron microscopy;Cosslett;Optik,1967