STOYKOVA, K.; KOLEVA-REKALOVA, E.; VENNEMANN, T.; IVANOV, M. New Data on the Expression of the Early Eocene Hyperthermals in Northern Bulgaria: Riben Section Revisited. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 76, n. 11, p. 1687–1697, 2023. DOI: 10.7546/CRABS.2023.11.06. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/418. Acesso em: 9 dec. 2024.