Oklay, N., Vincent, J.-B., Sierks, H., Besse, S., Pajola, M., Bertini, I., et al. (2015). Characterization of OSIRIS NAC filters for the interpretation of multispectral data of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics, 583: A45. doi:10.1051/0004-6361/201525994.