Wavefront measurements in the soft X-ray rangeS. Le Pape, Ph. Zeitoun, M. Idir, P. Dhez, D. Ros, A. Carillon, J. J. Roca and M. FrançoisEur. Phys. J. AP, 20 3 (2002) 197-203DOI: https://doi.org/10.1051/epjap:2002092