SCHOVSBO, N. H. .; RASMUSSEN, S. L. .; SHELDON, E. .; STEMMERIK, L. . Correlation of carbon isotope events in the Danish Upper Cretaceous chalk. GEUS Bulletin, Copenhagen, Denmark, v. 15, p. 13–16, 2008. DOI: 10.34194/geusb.v15.5032. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/5032. Acesso em: 26 apr. 2024.