Invited Article: Coherent imaging using seeded free-electron laser pulses with variable polarization: First results and research opportunities. - Capotondi, F.; Pedersoli, E.; Mahne, N.; Menk, R. H.; Passos, G.; Raimondi, L.; Svetina, C.; Sandrin, G.; Zangrando, M.; Kiskinova, M.; Bajt, S.; Barthelmess, M.; et al. (Review of Scientific Instruments, 2013)