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2. Sphärische und chromatische Korrektur von Elektronenlinsen;Scherzer;Optik,1947
3. The theoretical resolution limit of the electron microscope;Scherzer;J. Appl. Phys.,1949
4. Outline of a spherically corrected semiaplanatic medium-voltage transmission electron-microscope;Rose;Optik,1990
5. Correction of the spherical aberration of a 200kV TEM by means of a hexapole-corrector;Haider;Optik,1995