Seasonal variations in activity concentrations of 137Cs, 40K, 7Be, 228Ra, 99Tc, 90Sr, and 
Pu in Fucus vesiculosus and Ascophyllum nodosum from the southeastern coast of Norway
Radioprotection, 40 (2005) S641-S647
DOI: https://doi.org/10.1051/radiopro:2005s1-094