An essential property of synchrotron radiation: linear and circular polarization for X-ray absorption spectroscopy E. Dartyge, A. Fontaine, F. Baudelet, C. Giorgetti, S. Pizzini et H. Tolentino J. Phys. I France, 2 6 (1992) 1233-1255 DOI: 10.1051/jp1:1992206