Sarnthein, M.; Pflaumann, U.; Ross, R.; Tiedemann, Ralf; Winn, K. (1992): Transfer functions to reconstruct ocean palaeoproductivity; a comparison. Geological Society of London, London, United Kingdom, In: Summerhayes, C. P. (editor), Prell, Warren L. (editor), Emeis, Kay-Christian (editor), Upwelling systems; evolution since the early Miocene, 64, 411-427, georefid:2001-063919