Steering of Sub-GeV electrons by ultrashort Si and Ge bent crystals A. I. Sytov, L. Bandiera, D. De Salvador, A. Mazzolari, E. Bagli, A. Berra, S. Carturan, C. Durighello, G. Germogli, V. Guidi et al. (7 more) Eur. Phys. J. C, 77 12 (2017) 901 Published online: 23 December 2017 DOI: 10.1140/epjc/s10052-017-5456-7