B. Hidding, G. Manahan, G. Wittig, O. Karger, A. Knetsch, C. Aniculaesei, J.B. Rosenzweig, Y. Xi, A. Murokh, J. Smith, G. Andonian, D.L. Bruhwiler, M. Hogan, V. Yakimenko, L. Campbell, B. McNeil, Z.-M. Sheng, B. Ersfeld, R. Islam and D. Jaroszynski, “Progress Report: Trojan Horse Hybrid Plasma Wakefield Acceleration,” presented at the Int. Part. Accel. Conf. (Dresden, June 2014).