1. E. Bauer, Ultramicroscopy 12 (1985) 51.
2. W. Telieps, E. Bauer, Ultramicroscopy 17 (1985) 57.
3. E. Bauer, T. Franz, C. Koziol, G. Lilienkamp, T. Schmidt, in: R. Rosei (Eds.), Chemical, Structural and Electronic Analysis of Heterogeneous Surface on Nanometer Scale, Kluwer, Dordrecht, 1995.
4. H. Rose, Optik 77 (1987) 26.
5. M. Scheinfein, Optik 82 (1989) 99.