1. Proceedings on the Spring School on Pion Interactions at Low and Medium Energies,1971
2. Proceedings on the Lampf Summer School on The Theory of Pion-Nucleus Scattering,1973
3. M. M. Sternheim and R. R. Silbar, Preprint (1974).
4. Optical Model Potential for Pion-Nucleus Scattering