M. Silverstone

Blood sampling as a non-destructive method for monitoring levels and effects of organochlorines (PCB and DDT) in seals

B. Jenssen, J. U. Skaare, D. Vongraven, 1994 .

Assessment of the vulnerability of grey seals to oil contamination at Froan, Norway

B. Jenssen, D. Vongraven, M. Ekker, 1995 .