Speciation needs in relation with environmental and biological purposes V. Moulin, E. Ansoborlo, L. Bion, D. Doizi, C. Moulin, G. Cote, C. Madic and J. Van der Lee Radioprotection, 40 (2005) S11-S18 Published online: 17 June 2005 DOI: 10.1051/radiopro:2005s1-003