Dynamics of strontium-90 in forest ecosystems F. Bruchertseifer, M. Steiner, L. Hiersche, B. Savkin, A. Poppitz-Spuhler and E. Wirth Radioprotection, 37 C1 (2002) C1-409-C1-413 Published online: 14 October 2009 DOI: 10.1051/radiopro/2002077