| ISBN 92-9083-174-X | |
| Publication date: December 2000 | |
| Editor: | K. Elsener |
| Authors: | M. Buhler-Broglin, K. Elsener, L.A. Lopez Hernandez, G.R. Stevenson, M. Wilhelmsson |
| Prepared by: | D. Lajust, H.H. Vincke |
| Illustrations: | J.-L. Caron (Figures 3 and 4 are published with the agreement of the Italian Gran Sasso National Laboratory) |