1. T.A. Ensslin, in: Proceedings of The Universe at Low Radio Frequencies, ASP Conference Series, 1999 (preprint astro-ph/0001433)
2. Hard X-Ray Radiation in the Coma Cluster Spectrum
3. J.A. Eilek, Diffuse Thermal and Relativistic Plasma in Galaxy Clusters, Ringberg Workshop, Germany, MPE-Report, 1999 (preprint astro-ph/9906485)
4. T.E. Clarke, P.P. Kronberg, H. Böringer, in: H. Böringer, L. Feretti, P. Schuecker (Eds.), Ringberg Workshop on Diffuse Thermal and Relativistic Plasma in Galaxy Clusters, MPE Report No. 271, 1999
5. Stochastic Acceleration and Nonthermal Radiation in Clusters of Galaxies