1. Adatte, T., G. Keller, and G. Baum. 2011. Age and origin of the Chicxulub impact and sandstone complex, Brazos River, Texas: evidence from lithostratigraphy, sedimentology and sequence stratigraphy. In The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas. Society for Sedimentary Geology (SEPM), Special Publication 100: 43–80.
2. Adolfssen, J., and D. Ward. 2014. Crossing the boundary: an elasmobranch fauna from Stevns Klint, Denmark. Palaeontology 57: 591–629.
3. Adolfssen, J., and D. Ward. 2015. Neoselachians from the Danian (early Paleocene) of Denmark. Acta Palaeontologica Polonica 60: 313–339.
4. Agassiz, L. 1833–1844. Recherches sur les Poissons fossiles Vol. 1–5. Neuchâtel and Soleure: Imprimerie de Petitpierre.
5. Albertão, G., E. Koutsoukos, M. Regali, M. Attrep, and P. Martins. 1994. The Cretaceous–Tertiary boundary in southern low-latitude regions: preliminary study in Pernambuco, northeastern Brazil. Terra Nova 6: 366–375.