de Graciansky, P. C.; Deroo, G.; Herbin, J. P.; Montadert, L.; Mueller, C.; Schaaf, A.; Sigal, J. (1984): Ocean-wide stagnation episode in the Late Cretaceous. Macmillan Journals, London, United Kingdom, Nature (London), 308 (5957), 346-349, georefid:1984-036493