Birkelund, T., et al. (1984). Cretaceous stage boundaries—proposals. Bulletin of the Geological Society of Denmark. 33: 3-20. gs

Gale, A. S., et al. (2011). The uppermost Middle and Upper Albian succession at the Col de Palluel, Hautes-Alpes, France: an integrated study (ammonites, inoceramid bivalves, planktonic foraminifera, nannofossils, geochemistry, stable oxygen and carbon isotopes, cyclostratigraphy). Cretaceous Research. 32: 59-130. gs

Gradstein, F. M., et al. (1994). Cenozoic biostratigraphy of the North Sea and Labrador Shelf. Micropaleontology. 40 (Suppl.),: 1-152. gs

Haq, B. U., Hardenbol, J. & Vail, P. R. (1987). Chronology of fluctuating sea levels since the Triassic. Science. 235: 1156-1167. gs

Hardenbol, J., et al. (1998). Mesozoic and Cenozoic Sequence Chronostratigraphic Framework of European Basins. In, de Graciansky, P. -C. , Hardenbol, J. , Jacquin, T. , and Vail, P. R. (ed.) Mesozoic- Cenozoic Sequence Stratigraphy of European Basins. SEPM Special Publication . 60: 3-13 & appendix 763-783. gs

Henderson, C. M. & Shen, S. -Z. (2020). Chapter 24 - The Permian Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 2: 875-902. gs

Hesselbo, S. P., Ogg, J. G. & Ruhl, M. (2020c). Chapter 26 - The Jurassic Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 2: 955-1022. gs

Kennedy, W. J. (1984). Ammonite faunas and the ‘standard zones’ of the Cenomanian to Maastrichtian Stages in their type areas, with some proposals for the definition of the stage boundaries by ammonites. Bulletin of the Geological Society of Denmark. 33: 147-161. gs

Klug, C., et al. (2015). Ammonoid Paleobiology: From Macroevolution to Paleogeography. Topics in Geobiology. 44: 1-328. gs

McArthur, J. M., et al. (1993). Strontium isotope stratigraphy in the late Cretaceous: numerical calibration of the Sr isotope curve, and international correlation for the Campanian. Paleoceanography. 8: 859-873. gs

Obradovich, J. D., et al. (2002). Integrated biostratigraphic and radiometric scale on the Lower Cenomanian (Cretaceous) of Hokkaido, Japan. Proceedings of the Japan Academy. Series B-Physical and Biological Sciences 78(6): 149-153. gs

Ogg, J. G., et al. (1991). Magnetostratigraphy of the Jurassic Cretaceous boundary interval—Tethyan and English faunal realms. Cretaceous Research. 12: 455-482. gs

Przybylski, P. A., et al. (2010b). Magnetostratigraphic correlation of the Oxfordian-Kimmeridgian Boundary. Earth and Planetary Science Letters. 289: 256-272. gs

Rawson, P. F., et al. (1978). A correlation of Cretaceous rocks in the British Isles. Geological Society of London Special Report. 9: 70-. gs

Thierry, J. (1998). Ammonites. Columns for Jurassic chart of Mesozoic and Cenozoic sequence chronostratigraphic framework of European basins, by Hardenbol, J., Thierry, J., Farley, M.B., Jacquin, T., de Graciansky, P.-C., and Vail, P.R. (coordinators). In, de Graciansky, P. -C. , Hardenbol, J. , Jacquin, T. , and Vail, P. R. (ed.) Mesozoic- Cenozoic Sequence Stratigraphy of European Basins. SEPM Special Publication . 60: 776-777. gs

Tozer, E. T. (1984). The Trias and its Ammonites: the evolution of a time scale. Geological Survey of Canada Miscellaneous Report. 35: 1-171. gs