1. The Barkas effect and other higher-order Z1-contributions to the stopping power;Andersen,1985
2. Measurement of the Z13 contribution to the stopping power using MeV protons and antiprotons: The Barkas effect;Andersen;Phys. Rev. Lett.,1989
3. Multiple ionization of He, Ne, and Ar by fast protons and antiprotons;Andersen;Phys. Rev. A,1987
4. Der Ionisierungsgrad isolierter exotischer Atome;Bacher;Ph.D. Dissertation, Universität Karlsruhe,1987
5. On the production of highly ionized antiprotonic noble gas atoms at rest;Bacher,1987