Electron screening in backward elastic scattering F. Schümann, S. Zavatarelli, L. Gialanella, U. Greife, M. Junker, D. Rogalla, C. Rolfs, F. Strieder and H.P. Trautvetter Eur. Phys. J. A, 2 4 (1998) 337-342 Published online: 15 August 1998 DOI: 10.1007/s100500050130