Influence of sulphur cycle on mercury methylation in estuarine sediment (Seine estuary, France) S. Niessen, D. Foucher, O. Clarisse, J. C. Fischer, N. Mikac, Z. Kwokal, V. Fajon et M. Horvat J. Phys. IV France, 107 (2003) 953-956 DOI: 10.1051/jp4:20030456