Hodell, David A.; Warnke, Detlef A. (1991): Climatic evolution of the Southern Ocean during the Pliocene epoch from 4.8 to 2.6 million years ago. Pergamon, Oxford, United Kingdom, In: Cronin, Thomas M. (editor), Dowsett, Harry J. (editor), Pliocene climates, 10 (2-3), 205-214, georefid:1992-019645