1. Proc. VIth Int. Symp. on Exoelectron Emission and Applications;Kriegseis,1979
2. Proc. VIth Int. Symp. on Exo-electron Emission and Applications;Petel,1979
3. Exoelectron emission from the system γ – α Al2O3
4. Proc. VIth Int. Symp. on Exoelectron Emission and Applications;Kottler,1979
5. Proc. VIth Int. Symp. on Exoelectron Emission and Applications;Scharmann,1979