KRÖGER, Björn; POHLE, Alexander. Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen – a pelagic fauna with Laurentian affinities. European Journal of Taxonomy, [S. l.], v. 783, n. 1, p. 1–102, 2021. DOI: 10.5852/ejt.2021.783.1601. Disponível em: https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/1601. Acesso em: 24 apr. 2026.