Free electron laser polarization control with interfering crossed polarized fields por Eugenio Ferrari, Eléonore Roussel, Jens Buck, Carlo Callegari, Riccardo Cucini, Giovanni De Ninno, Bruno Diviacco, David Gauthier, Luca Giannessi, Leif Glaser, Gregor Hartmann, Giuseppe Penco, Frank Scholz, Joern Seltmann, Ivan Shevchuk, Jens Viefhaus, Marco Zangrando, Enrico Massimiliano Allaria