U. Kleineberg and . Heinzmann, Thin Solid Films, pp.464-465, 2004.

A. Aquila, F. Salmassi, and E. Gullikson, Metrologies for the phase characterization of attosecond extreme ultraviolet optics, Optics Letters, vol.33, issue.5, pp.455-248, 2008.
DOI : 10.1364/OL.33.000455