V. Lourenco, E. Ansoborlo, G. Cote, and C. Moulin, Under submission, 2005.

C. S. Cobbett, Plant Physiology, vol.123, p.825, 2000.

R. M. Smith and A. E. Martell, Critically Selected Stability Constants of Metal Complexes Database, 1997.

G. Plancque, V. Moulin, P. Toulhoat, and C. Moulin, Analytica Chimica Acta, vol.478, p.11, 2003.

C. H. Evans, Biochemistry of the Lanthanides', vol.8, 1990.

C. Jacopin, M. Sawicki, G. Plancque, D. Doizi, F. Taran et al., Inorganic Chemistry, vol.42, p.5015, 2003.

S. Colette, B. Amekraz, C. Madic, L. Berthon, G. Cote et al., Inorganic Chemistry, vol.42, p.2215, 2003.

G. Plancque, Y. Maurice, V. Moulin, P. Toulhoat, and C. Moulin, Applied Spectroscopy, p.109, 2005.