How to cite 

Grimaud D, Blanc G, Charlou Jean-Luc, Jean-Baptiste P, Dmitriev L (1992). Manganese, methane and helium anomalies in seawater above the Mid-Atlantic Ridge: evidence of hydrothermal activity. Bulletin de la Société géologique de France, 45(2), 61-75. Open Access version : https://archimer.ifremer.fr/doc/00070/18106/