Electronic surface resonances in transverse-electron-focusing experiments V. S. Tsoi, Y. de Wilde, T. Noller, A. G.M. Jansen, P. Wyder, D. Heitmann and M. Riek Europhys. Lett., 35 1 (1996) 43-48 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00528-3