Bioaccumulation and chronic toxicity of arsenic and zinc in the aquatic oligochaetes Branchiura sowerbyi and Tubifex tubifex (Annelida, Clitellata)

1. Lobo, H.
2. Méndez-Fernández, L.
3. Martínez-Madrid, M.
4. Rodriguez, P.
5. Daam, M.A.
6. Espíndola, E.L.G.