Steering efficiency of a ultrarelativistic proton beam in a thin bent crystal E. Bagli, L. Bandiera, V. Guidi, A. Mazzolari, D. De Salvador, A. Berra, D. Lietti, M. Prest and E. Vallazza Eur. Phys. J. C, 74 1 (2014) 2740 Published online: 28 January 2014 DOI: 10.1140/epjc/s10052-014-2740-7