1. Lefèvre, P., Möhl, D., Plass, G.: 11th Int. Conf. on High-Energy Accelerators, Geneva, 1980, p. 819. Basel: Birkhäuser Verlag 1980
2. Hütten, L., Poth, H., Wolf, A., Haseroth, H., Hill, Ch.: The electron cooling device for LEAR. Gastaldi, U. (ed.). Proc. Workshop on Physics at LEAR with Low-Energy Cooled Antiprotons, Erice, May 1982 (to be published)
3. Budker, G.I., Skrinsky, A.N.: Sov. Phys.-Usp.21, 277 (1978)
4. Bell, M., Chaney, J., Herr, H., Krienen, F., Møller-Petersen, P., Petrucci, G.: Nucl. Instrum. Methods190, 237 (1981)
5. Herr, H., Möhl, D., Winnacker, A.: Production of and Experimentation with Antihydrogen at LEAR. Gastaldi, U. (ed.). Proc. Workshop on Physics at LEAR with Low-Energy Cooled Antiprotons, Erice, May 1982 (to be published)