Polarization of Saturn’s moon Iapetus - III. Models of the bright and the dark sidesC. Ejeta, K. Muinonen, H. Boehnhardt, S. Bagnulo, L. Kolokolova, D. Guirado and G. P. TozziA&A, 554 (2013) A117DOI: https://doi.org/10.1051/0004-6361/201220467