Becker, R. T., Gradstein, F. M. & Hammer, O. (2012). The Devonian Period. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2012. Amsterdam: Elsevier Press 2: 559-601. gs

Aretz, M., Herbig, H. -G. & Wang, X. D. (2020). Chapter 23 - The Carboniferous 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: 811-874. gs

Gradstein, F. M., et al. (1994). Cenozoic biostratigraphy of the North Sea and Labrador Shelf. Micropaleontology. 40 (Suppl.),: 1-152. 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. (2020). Chapter 3D - Conodonts. In, Gradstein, F. M. , Ogg, J. G. , Schmitz, M. D. , and Ogg, G. M. (ed.) The Geologic Time Scale 2020. Elsevier, Boston, MA 1: 56-60. gs

Henderson, C. M., Davydov, V. I. & Wardlaw, B. R. (2012a). The Permian Period. In, Gradstein, F. , et al. , (ed.) The Geologic Time Scale 2012. Amsterdam: Elsevier Press 653-679. gs

Hoedemaeker, P. J., et al. (1993). Ammonite zonation for the Lower Cretaceous of the Mediterranean region; basis for the stratigraphic correlation within IGCP, Project 262. Revista Española de Paleontología. 8: 117-120. gs

Jenks, J. F., et al. (2015). Chapter 13. Biostratigraphy of Triassic ammonoids. In, Klug, C. , Korn, D. , De Baets, K. , Kruta, I. , Mapes, R. H. (ed.) Ammonoid Paleobiology: From Macroevolution to Paleogeography. Topics in Geobiology . 44: 329-371. gs

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

Kozur, H. W. (2003). Integrated ammonoid, conodont and radiolarian zonation of the Triassic. Hallesches Jahrbuch für Geowissenschaften. B25: 49-79. gs

Leckie, R. M., Bralower, T. J. & Cashman, R. (2002). Oceanic anoxic events and plankton evolution: biotic response to tectonic forcing during the mid-Cretaceous. Paleoceanography. 17(1288): -. gs

McArthur, J. M., et al. (2007). Palaeotemperatures, polar ice-volume, and isotope stratigraphy (Mg/Ca, d18O, d13C, 87Sr/86Sr): the Early Cretaceous (Berriasian, Valanginian, Hauterivian). Palaeogeography Palaeoclimatology Palaeoecology. 248: 391-430. gs

Mietto, P. & Manfrin, S. (1998). Ammonoid. Columns for Triassic 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: 779-779. gs

Moullade, M., et al. (1998). Le stratotype historique de l’Aptien (région de Cassis-La Bédoule, SE France): synthèse stratigraphique. Géologie Méditerranéene. 25(3-4): 289-298. gs

Obradovich, J. D. (1993). A Cretaceous time scale. In, Caldwell, W. G. E. , and Kauffman, E. G. (ed.) Evolution of the Western Interior Basin. Geological Association of Canada, Special Paper . 39: 379-396. gs

Reboulet, S., et al. (2018). Report on the 6th international meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017). Cretaceous Research. 91: 100-110. 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