1. Haq, B. U., Hardenbol, J. & Vail, P. R. Science 235, 1156–1166 (1987).
2. Vail, P. R., Hardenbol, J. & Todd, R. G. Mem. Am. Ass. Petrol. Geol. 36, 129–144 (1985).
3. Vail, P. R., Mitchum, R. M. & Thompson, S. Mem. Am. Ass. Petrol. Geol. 26, 83–97 (1977).
4. Harland, W. B. et al. A Geologic Time Scale (Cambridge University Press, 1982).
5. Sheridan, R. E. Paleoceanography 2, 97–118 (1987).