1. An efficient single crystal BSE detector in SEM;Autrata;Scanning,1992
2. Low energy electron microscopy;Bauer;Scanning Microscopy Suppl.,1987
3. Bok AB A mirror electron microscope Dissertation, Technical University Delft 1968
4. Efficient collection of BSE with single-polepiece lens;Lenc;Inst Phys Conf Ser No 93,1988
5. Electron optical properties of a cathode lens;Lenc;Ultramicroscopy,1992a