Progress with the single-sided module prototypes for the ATLAS tracker upgrade stave - Allport, P; Affolder, A; Anghinolfi, F; Bates, R; Betancourt, C; Buttar, C; Carter, JR; Casse, G; Chen, H; Chilingarov, A; Civera, J; Clark, A; et al. (NUCLEAR INSTRUMENTS and METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2011)