YOUNG, Timothy P.; DONOVAN, Stephen K. The eocrinoid Ascocystites Barrande (Echinodermata, Blastozoa) from the Middle Ordovician of central Portugal, with comments on the stratigraphy of the Brejo Fundeiro Formation. Atlantic Geoscience, [S. l.], v. 29, n. 2, 1993. DOI: 10.4138/1997. Disponível em: https://journals.lib.unb.ca/index.php/ag/article/view/1997. Acesso em: 2 may. 2024.