Assessing exposure to cosmic radiation aboard aircraft: the SIEVERT system J. F. Bottollier-Depois, A. Biau, P. Blanchard, I. Clairand, P. Dessarps, P. Lantos, D. Saint-Lô and M. Valero Radioprotection, 38 3 (2003) 357-366 Published online: 17 June 2005 DOI: 10.1051/radiopro:2003013