Wavefront measurements in the soft X-ray range S. Le Pape, Ph. Zeitoun, M. Idir, P. Dhez, D. Ros, A. Carillon, J. J. Roca and M. François Eur. Phys. J. AP, 20 3 (2002) 197-203 Published online: 15 November 2002 DOI: 10.1051/epjap:2002092